The number "1251" is a four-digit integer that follows 1250 and precedes 1252. It is an even number and can be expressed as the sum of its digits: 1 + 2 + 5 + 1 = 9. In mathematics, it can also be factored into prime numbers, specifically 1251 = 3 × 417. In historical contexts, the year 1251 is notable for various events, including the establishment of the Mongol Empire in parts of Asia and Europe. It was a time of significant cultural and political changes, influencing the development of many regions around the world.