1252651631 has 24 divisors (see below), whose sum is σ = 1613408256. Its totient is φ = 961495920.

The previous prime is 1252651601. The next prime is 1252651633. The reversal of 1252651631 is 1361562521.

It is a de Polignac number, because none of the positive numbers 2^k-1252651631 is a prime.

It is a super-2 number, since 2×1252651631² = 3138272217293920322, 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 (1252651633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18770 + ... + 53456.

It is an arithmetic number, because the mean of its divisors is an integer number (67225344).

Almost surely, 2^1252651631 is an apocalyptic number.

1252651631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1252651631 is a deficient number, since it is larger than the sum of its proper divisors (360756625).

1252651631 is a wasteful number, since it uses less digits than its factorization.

1252651631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34779 (or 34772 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 1252651631 is about 35392.8189185320. The cubic root of 1252651631 is about 1077.9785091572.

The spelling of 1252651631 in words is "one billion, two hundred fifty-two million, six hundred fifty-one thousand, six hundred thirty-one".