1257998832 has 60 divisors (see below), whose sum is σ = 3526604640. Its totient is φ = 418623744.

The previous prime is 1257998821. The next prime is 1257998837. The reversal of 1257998832 is 2388997521.

It is a super-2 number, since 2×1257998832² = 3165122122626728448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257998837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81769 + ... + 95927.

It is an arithmetic number, because the mean of its divisors is an integer number (58776744).

Almost surely, 2^1257998832 is an apocalyptic number.

1257998832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1257998832 is an abundant number, since it is smaller than the sum of its proper divisors (2268605808).

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

1257998832 is a wasteful number, since it uses less digits than its factorization.

1257998832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14790 (or 14781 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1257998832 is about 35468.2792365234. The cubic root of 1257998832 is about 1079.5101894132.

The spelling of 1257998832 in words is "one billion, two hundred fifty-seven million, nine hundred ninety-eight thousand, eight hundred thirty-two".