1251064632 has 32 divisors (see below), whose sum is σ = 3129169680. Its totient is φ = 416820480.

The previous prime is 1251064589. The next prime is 1251064637. The reversal of 1251064632 is 2364601521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251064632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251064637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43318 + ... + 66170.

Almost surely, 2^1251064632 is an apocalyptic number.

1251064632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251064632 is an abundant number, since it is smaller than the sum of its proper divisors (1878105048).

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

1251064632 is a wasteful number, since it uses less digits than its factorization.

1251064632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25143 (or 25139 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1251064632 is about 35370.3920249691. The cubic root of 1251064632 is about 1077.5230822480.

The spelling of 1251064632 in words is "one billion, two hundred fifty-one million, sixty-four thousand, six hundred thirty-two".