1125265155 has 48 divisors (see below), whose sum is σ = 2123967744. Its totient is φ = 507138240.

The previous prime is 1125265129. The next prime is 1125265157. The reversal of 1125265155 is 5515625211.

It is not a de Polignac number, because 1125265155 - 2⁵ = 1125265123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125265157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41404 + ... + 62966.

It is an arithmetic number, because the mean of its divisors is an integer number (44249328).

Almost surely, 2^1125265155 is an apocalyptic number.

1125265155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1125265155 is a deficient number, since it is larger than the sum of its proper divisors (998702589).

1125265155 is a wasteful number, since it uses less digits than its factorization.

1125265155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21656 (or 21649 counting only the distinct ones).

The product of its digits is 15000, while the sum is 33.

The square root of 1125265155 is about 33544.9721269820. The cubic root of 1125265155 is about 1040.1236154222.

The spelling of 1125265155 in words is "one billion, one hundred twenty-five million, two hundred sixty-five thousand, one hundred fifty-five".