1252627644 has 24 divisors (see below), whose sum is σ = 2984986368. Its totient is φ = 408658480.

The previous prime is 1252627627. The next prime is 1252627667. The reversal of 1252627644 is 4467262521.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109922 + ... + 1111049.

It is an arithmetic number, because the mean of its divisors is an integer number (124374432).

Almost surely, 2^1252627644 is an apocalyptic number.

It is an amenable number.

1252627644 is an abundant number, since it is smaller than the sum of its proper divisors (1732358724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252627644 is a wasteful number, since it uses less digits than its factorization.

1252627644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221025 (or 2221023 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 1252627644 is about 35392.4800487335. The cubic root of 1252627644 is about 1077.9716283840.

The spelling of 1252627644 in words is "one billion, two hundred fifty-two million, six hundred twenty-seven thousand, six hundred forty-four".