1260

1260 is a natural number that comes after 1259 and before 1261. In prime factorization it equals 2^2 × 3^2 × 5 × 7, making it a highly composite number with 36 positive divisors. Its decimal digit sum is 1+2+6+0 = 9, which divides 1260, so it is a Harshad (Niven) number in base 10. The Roman numeral representation of 1260 is MCCLX.

1260 CE was a year in the 13th century. Its most notable event was the Battle of Ain Jalut on September 3, 1260, in the Jezreel Valley, where the Mamluk sultanate of Egypt and Syria under Qutuz defeated the Mongol army led by Kitbuqa. The victory checked the westward expansion of the Mongol empire into the Levant and demonstrated the effectiveness of the Mamluk military system. In the aftermath, Qutuz was assassinated, and Baybars, his commander, succeeded to the throne and continued efforts against Mongol forces and Crusader states. The battle is frequently cited as a turning point in Middle Eastern history, helping to shape subsequent regional power dynamics.

Beyond history, 1260 is noted for its mathematical properties as described, including its factorization and status as a Harshad number. It also appears in discussions of numeracy, calendar calculations, and Roman numerals, where it is written as MCCLX. The year and the number share the calendar and numerical significance that motivate their occasional joint mention in historical and mathematical contexts.