1141

1141 is a natural number that follows 1140 and precedes 1142. In arithmetic, it is an odd composite number with prime factorization 7 × 163. It is not a prime, not a power, and it has exactly four divisors: 1, 7, 163, and 1141. In different numeral systems, 1141 is written as 10001110101 in binary and 0x475 in hexadecimal. In Roman numerals, it is MCXLI.

1141 can also denote a year in the common era, notably the year 1141 CE. It is part of the 12th century, a period characterized by continuing Crusades in the Holy Land, evolving medieval governance in Europe, and developments in adjacent regions. As with any year in this era, events were distributed across various kingdoms and cultures, with local significance ranging from political alliances to military campaigns and religious affairs.