1250 can refer to the integer that follows 1249 and precedes 1251, or to years denoted 1250 BC and AD 1250. As a number it has simple algebraic structure and appearances in numeral systems; as a year it sits in the middle of the 13th century, a period of military, political and cultural change across Eurasia and North Africa.
Mathematical properties
In arithmetic, 1250 = 2 × 5^4, so its prime factorization is 2 · 5^4. It is an even composite number with exactly 10 positive divisors: 1, 2, 5, 10, 25, 50, 125, 250, 625 and 1250. The sum of all divisors (sigma) is 2,343 and the sum of proper divisors is 1,093, which makes 1250 a deficient number (proper sum < number). Its Euler totient is φ(1250) = 500. Because 5^4 divides it, the Möbius function μ(1250) = 0.
Other representations: Roman numeral MCCL; binary 1001110010; hexadecimal 0x4E2; in base 5, because it equals 2·5^4, it has the compact form 20000_5. It is not a perfect square or cube, and it does not satisfy typical digit-based divisibility like being a Harshad number in base 10.
Year AD 1250: historical context
The year 1250 CE falls in the high Middle Ages. Several broad trends characterize the era: the Mongol Empire remained a major force across Asia and parts of Eastern Europe; Western Europe continued urbanization and the growth of universities and Gothic architecture; the Crusading movement and the politics of the Eastern Mediterranean were in flux.
Specific developments around 1250 include the decline of Ayyubid control in Egypt and the rise of military slave elites who soon established the Mamluk Sultanate; the Seventh Crusade (mid-13th century) saw Crusader operations in Egypt and setbacks for Crusader forces, including the capture and ransom of European leaders; and in the Holy Roman Empire the death of Emperor Frederick II in 1250 intensified imperial and papal rivalries. These events helped reshape political boundaries and influenced trade and cultural exchange across regions.
1250 BC and broader uses
As 1250 BC, the date sits near the late Bronze Age, an era of complex polities in the eastern Mediterranean and Near East. It is a useful reference point in archaeology and ancient history when discussing the material cultures and interactions of Mycenaean, Hittite, Egyptian and Levantine societies, although precise events and chronologies vary by region.
In everyday use, the number 1250 appears in model numbers, catalogues, measurements and addresses; its mathematical features (simple factorization, short base-5 form) sometimes make it convenient in examples and computations.