12520636 has 18 divisors (see below), whose sum is σ = 23277968. Its totient is φ = 5891520.

The previous prime is 12520603. The next prime is 12520643. The reversal of 12520636 is 63602521.

It is a self number, because there is not a number n which added to its sum of digits gives 12520636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4260 + ... + 6571.

Almost surely, 2^12520636 is an apocalyptic number.

It is an amenable number.

12520636 is a deficient number, since it is larger than the sum of its proper divisors (10757332).

12520636 is a wasteful number, since it uses less digits than its factorization.

12520636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10869 (or 10850 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 12520636 is about 3538.4510735631. The cubic root of 12520636 is about 232.2070832357.

The spelling of 12520636 in words is "twelve million, five hundred twenty thousand, six hundred thirty-six".