1251375632 has 20 divisors (see below), whose sum is σ = 2611043820. Its totient is φ = 577557888.

The previous prime is 1251375623. The next prime is 1251375677. The reversal of 1251375632 is 2365731521.

It can be written as a sum of positive squares in 2 ways, for example, as 291863056 + 959512576 = 17084^2 + 30976^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1251375592 and 1251375601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3007907 + ... + 3008322.

It is an arithmetic number, because the mean of its divisors is an integer number (130552191).

Almost surely, 2^1251375632 is an apocalyptic number.

It is an amenable number.

1251375632 is an abundant number, since it is smaller than the sum of its proper divisors (1359668188).

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

1251375632 is a wasteful number, since it uses less digits than its factorization.

1251375632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016250 (or 6016244 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 1251375632 is about 35374.7880841709. The cubic root of 1251375632 is about 1077.6123613857.

The spelling of 1251375632 in words is "one billion, two hundred fifty-one million, three hundred seventy-five thousand, six hundred thirty-two".