12900591 has 24 divisors (see below), whose sum is σ = 20442240. Its totient is φ = 7774800.

The previous prime is 12900581. The next prime is 12900593. The reversal of 12900591 is 19500921.

It is a happy number.

It is not a de Polignac number, because 12900591 - 2²² = 8706287 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12900593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30580 + ... + 30998.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^12900591 is an apocalyptic number.

12900591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12900591 is a deficient number, since it is larger than the sum of its proper divisors (7541649).

12900591 is a wasteful number, since it uses less digits than its factorization.

12900591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 12900591 is about 3591.7392722746. The cubic root of 12900591 is about 234.5325914000.

The spelling of 12900591 in words is "twelve million, nine hundred thousand, five hundred ninety-one".