1125569631 has 16 divisors (see below), whose sum is σ = 1520513024. Its totient is φ = 740565504.

The previous prime is 1125569611. The next prime is 1125569651. The reversal of 1125569631 is 1369655211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1125569611) and next prime (1125569651).

It is not a de Polignac number, because 1125569631 - 2⁶ = 1125569567 is a prime.

It is a super-2 number, since 2×1125569631² = 2533813988458952322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125569631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125569611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65880 + ... + 81186.

It is an arithmetic number, because the mean of its divisors is an integer number (95032064).

Almost surely, 2^1125569631 is an apocalyptic number.

1125569631 is a deficient number, since it is larger than the sum of its proper divisors (394943393).

1125569631 is a wasteful number, since it uses less digits than its factorization.

1125569631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630.

The product of its digits is 48600, while the sum is 39.

The square root of 1125569631 is about 33549.5101454552. The cubic root of 1125569631 is about 1040.2174197187.

The spelling of 1125569631 in words is "one billion, one hundred twenty-five million, five hundred sixty-nine thousand, six hundred thirty-one".