12621504 has 56 divisors (see below), whose sum is σ = 38169088. Its totient is φ = 3605760.

The previous prime is 12621493. The next prime is 12621509. The reversal of 12621504 is 40512621.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12621509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3352 + ... + 6039.

Almost surely, 2^12621504 is an apocalyptic number.

12621504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12621504 is an abundant number, since it is smaller than the sum of its proper divisors (25547584).

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

12621504 is an equidigital number, since it uses as much as digits as its factorization.

12621504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9413 (or 9403 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 12621504 is about 3552.6756114230. The cubic root of 12621504 is about 232.8289804618.

The spelling of 12621504 in words is "twelve million, six hundred twenty-one thousand, five hundred four".