One (number) 1 (number) One is the integer representing a single unit. This article summarizes its mathematical role as the multiplicative identity, its historical notation, and common uses and distinctio…
1×10^7 square metres (1 E7 m²) 1 E7 m² Definition and context for 1×10^7 m² (ten million square metres): conversions, common examples, measurement uses and how the scientific notation relates to SI area units.
1 E8 m² (1×10⁸ square metres) 1 E8 m² Explanation and context for the area quantity 1 E8 m² (one times ten to the eighth square metres), including conversions, common uses, examples, and notational variants.
1 E9 m² (1×10^9 square metres): meaning, conversions and uses 1 E9 m² Explanation of the notation 1 E9 m², its relation to km², common conversions, typical contexts where areas of this order are used, and practical examples and distinctions.
1,000,000,000 (one billion) 1,000,000,000 One billion (1,000,000,000) is the integer equal to a thousand million (10^9). This article explains notation, scales, common uses, examples, and basic mathematical properties.
Ten (number) 10 (number) Ten is the integer after nine and before eleven. This article explains its mathematical properties, role in numeral systems (decimal), historical notations like Roman X, and everyd…
100 (number) — meaning, properties, and common uses 100 (number) One hundred (100) is the natural number after 99 and before 101. It is 10 squared, a composite and abundant number, widely used as a unit (percent, cent, century) and a cultural be…
1000 (number) Overview of the natural number 1000: notation, mathematical properties, cultural and practical uses, and distinctions such as metric kilo versus binary kilo and Roman numeral M.
10,000 (number) 10000 (number) An overview of the number 10,000: mathematical properties, historical names (myriad, wan/man), common uses and cultural references such as the 10,000-meter race and the Ten Thousan…
The 100s (years 100–109 CE) 100s Overview of the decade 100–109 CE: numerical features, Roman and Han contexts, trade and culture, uses of the term, and notable mathematical and chronological notes.
1012 1012 is a natural number and calendar year. This article explains its mathematical properties, calendar significance (AD and BC), and common uses as an identifier.
1019 (number and year) 1019 A compact reference to 1019 as an integer and as a calendar year: arithmetic properties (prime, safe and twin prime), representations, cryptographic relevance, and a brief historic…
102 (number) Overview and properties of the integer 102: divisors, factorization, numeric functions, representations, history, and notable facts including its role as an atomic number.
1039 (number) 1039 1039 is a natural number and a prime. This article summarizes its mathematical properties, common representations, and a brief note on its appearance as a year in historical chrono…
Form 1040 (U.S. Individual Income Tax Return) 1040 Form 1040 is the U.S. federal individual income tax return used to report income, compute tax liability, claim credits and determine refund or amount due.
1042 — integer, properties and the year 1042 1042 1042 is an even semiprime (2 × 521) with simple digital and numeric representations, and a historical year noted for the English succession when Edward the Confessor became king.
1050: the integer, its properties, and historical uses 1050 Overview of 1050 as a number and a year: mathematical properties, numeral representations, historical context for the 11th century, and common ways the figure appears in modern des…
1070 (number, year, and identifier) 1070 1070 is an even composite integer with simple prime factors; it also names years (AD 1070, 1070 BC) and appears in product and model identifiers such as the NVIDIA GeForce GTX 1070…
1073 (number and year) 1073 Overview of 1073 as an integer — its mathematical properties, representations, and classification — plus a brief summary of notable events in the year AD 1073.
108 (number) 108 is an integer with mathematical, cultural, and practical significance: composite (2^2·3^3), abundant and refactorable, notable in geometry and religion, and used as an emergenc…
1080 (number, year, and modern usages) 1080 1080 is an integer with notable mathematical properties and a range of meanings: a medieval year, a modern video resolution (full HD), a three‑turn rotation in action sports, and a…
1087 1087 is an integer (an odd prime) and a calendar year (AD 1087). This article summarizes its mathematical properties, its place in medieval history, and other commonly noted facts…
Form 1099 (U.S.) — Informational tax returns for non-wage income 1099 Overview of the IRS 1099 series: common variants, what payments they report, who must file and receive them, differences from W-2 wages, and practical filing considerations.
1101: the number, its representations, and the year 1101 1101 1101 is an integer with arithmetic and computing significance and also denotes the year 1101 CE. Article covers mathematical properties, common numeral representations, historical…
1103 — the integer and the year 1103 Overview of 1103 as a natural number and as an early 12th‑century year: mathematical properties, common representations, historical context and notable characteristics.
1106 (number and year) 1106 1106 is a natural number with prime factors 2, 7, and 79; arithmetically it is even, squarefree and deficient. As a year, AD 1106 is noted for the Battle of Tinchebray and changes…
1121 (integer) 1121 An overview of the integer 1121: its factorization, arithmetic properties, representations, brief notes on the years 1121 AD/BC, and a few notable mathematical facts.
1122 (number and year) 1122 Overview of 1122 as an integer and as the calendar year AD 1122: numeric properties, mathematical divisors, and the key historical event—the Concordat of Worms—that marked its plac…
1123 (number and year) 1123 1123 is a natural number and a calendar year. Mathematically it is a prime with several common numeral representations. Historically, AD 1123 is known for the First Lateran Council…
1124 (number and year) 1124 1124 is an even composite integer with distinct arithmetic properties; it also denotes a year of the 12th century. This article summarizes its mathematics, representations, and bri…
1125 1125 is a natural number with simple prime factorization 3^2·5^3, a variety of arithmetic properties, and also a year designation (AD 1125) in historical chronology.
1128 (number and year) 1128 1128 is an integer with distinct mathematical properties and also denotes the year AD 1128, notable for events of the High Middle Ages such as the Battle of São Mamede and the marr…
1129 (number and year) 1129 1129 — a four‑digit integer and a calendar year. As a number it is an odd prime (Roman numeral MCXXIX); as a year it appears in the broader contexts of the 12th century AD and the…
1133 (number) 1133 1133 is a four‑digit natural number notable for being a semiprime (11 × 103) and a Blum integer. This article summarizes its arithmetic properties, representations, and common cont…
1135 — the number and the year 1135 1135 is an integer with specific arithmetic properties and also denotes the year AD 1135, notable for the death of King Henry I of England and the succession crisis that followed.
1137 (number and year) 1137 1137 is a natural number — an odd composite equal to 3 × 379 and a Blum integer. As a year (AD 1137) it is notable for the death of Louis VI of France and the marriage of Eleanor o…
1139 (number) 1139 1139 is a natural number. Mathematically it is a semiprime (17 × 67), has φ(1139) = 1056 and is deficient. As a year, AD 1139 is associated with the Second Lateran Council and earl…
1143 (number and year) 1143 Overview of 1143 as an integer and the year AD 1143: mathematical properties, numeric representations, and notable historical events in medieval Europe and the Byzantine Empire.
1144 (number and year) 1144 1144 is a natural number with prime factorization 2^3·11·13, 16 divisors and abundant; it also denotes the year AD 1144, noted for the fall of Edessa and its role in Crusader histo…
1145 — the number and the year 1145 Overview of 1145 as an integer (factorization, arithmetic properties and representations) and of the year 1145 CE in the high Middle Ages, with historical context and common usages…
1148 (year and integer) 1148 1148, an even composite integer and a year in the mid-12th century, notable mathematically for its factorization and historically for events of the Second Crusade, including the fa…
1149 (number and years) 1149 Overview of 1149 as an integer and as historical years: arithmetic properties, numeral representations, mathematical notes, and brief contextual remarks on 1149 AD/BC.
1150 1150 as an integer and as a year: mathematical properties, common representations, and historical context around the mid-12th century.
1151 (number and year) 1151 1151 is an odd natural number and a prime. This article explains its mathematical properties and numeral representations, offers brief context for the year 1151, and notes common u…
1155 (number, years, and common uses) 1155 Overview of 1155 as an integer, its arithmetic properties and divisors, the years AD 1155 and 1155 BC in broad historical context, and common modern uses such as Intel LGA 1155.
1156 — the number and the year 1156 1156 is an integer notable as a perfect square (34^2), with specific divisor structure and numeral representations; it is also a year marked in medieval European history by the Pri…
1157 1157 as an integer and a calendar year: its arithmetic properties, role as a medieval year (notable events and figures), and common modern uses as an identifier.
1159 1159 as an integer and a year: a semiprime number (19×61) with simple algebraic properties, and the year that saw the papal election producing Alexander III and an imperial-backed…
