12594640 has 20 divisors (see below), whose sum is σ = 29282724. Its totient is φ = 5037824.

The previous prime is 12594611. The next prime is 12594661. The reversal of 12594640 is 4649521.

It can be written as a sum of positive squares in 2 ways, for example, as 7683984 + 4910656 = 2772^2 + 2216^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78637 + ... + 78796.

Almost surely, 2^12594640 is an apocalyptic number.

12594640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12594640 is an abundant number, since it is smaller than the sum of its proper divisors (16688084).

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

12594640 is a wasteful number, since it uses less digits than its factorization.

12594640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157446 (or 157440 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12594640 is about 3548.8927850810. The cubic root of 12594640 is about 232.6636763226.

The spelling of 12594640 in words is "twelve million, five hundred ninety-four thousand, six hundred forty".