1125465631 has 4 divisors (see below), whose sum is σ = 1129745232. Its totient is φ = 1121186032.

The previous prime is 1125465629. The next prime is 1125465661. The reversal of 1125465631 is 1365645211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1125465631 - 2¹ = 1125465629 is a prime.

It is a super-2 number, since 2×1125465631² = 2533345773124456322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125465661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139406 + ... + 2139931.

It is an arithmetic number, because the mean of its divisors is an integer number (282436308).

Almost surely, 2^1125465631 is an apocalyptic number.

1125465631 is a deficient number, since it is larger than the sum of its proper divisors (4279601).

1125465631 is an equidigital number, since it uses as much as digits as its factorization.

1125465631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279600.

The product of its digits is 21600, while the sum is 34.

The square root of 1125465631 is about 33547.9601615359. The cubic root of 1125465631 is about 1040.1853808467.

The spelling of 1125465631 in words is "one billion, one hundred twenty-five million, four hundred sixty-five thousand, six hundred thirty-one".