12591136 has 12 divisors (see below), whose sum is σ = 24788862. Its totient is φ = 6295552.

The previous prime is 12591043. The next prime is 12591149. The reversal of 12591136 is 63119521.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 59536 = 3540^2 + 244^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196705 + ... + 196768.

Almost surely, 2^12591136 is an apocalyptic number.

12591136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12591136 is a deficient number, since it is larger than the sum of its proper divisors (12197726).

12591136 is an equidigital number, since it uses as much as digits as its factorization.

12591136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393483 (or 393475 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 12591136 is about 3548.3990756396. The cubic root of 12591136 is about 232.6420975891.

The spelling of 12591136 in words is "twelve million, five hundred ninety-one thousand, one hundred thirty-six".