1125

1125 is a natural number that follows 1124 and precedes 1126. It is an odd composite number with prime factorization 3^2 × 5^3, and it has 12 positive divisors. It is divisible by the sum of its digits (1 + 1 + 2 + 5 = 9), making it a Harshad (Niven) number in base 10.

In different numeral systems, 1125 is represented as decimal 1125, binary 10001100101_2, octal 2145_8, hexadecimal 0x465, and base-5 14000_5. Its Roman numeral representation is MCXXV.

As a year, 1125 CE falls in the 12th century of the Common Era. Historical sources from this period document feudal and ecclesiastical developments across Europe and reflect the broader dynamics of the High Middle Ages.