12561632 has 24 divisors (see below), whose sum is σ = 25048800. Its totient is φ = 6200064.

The previous prime is 12561599. The next prime is 12561671. The reversal of 12561632 is 23616521.

It is an alternating number because its digits alternate between odd and even.

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, 44 + ... + 5012.

It is an arithmetic number, because the mean of its divisors is an integer number (1043700).

Almost surely, 2^12561632 is an apocalyptic number.

It is an amenable number.

12561632 is a deficient number, since it is larger than the sum of its proper divisors (12487168).

12561632 is an equidigital number, since it uses as much as digits as its factorization.

12561632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058 (or 5050 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 12561632 is about 3544.2392695753. The cubic root of 12561632 is about 232.4602437129.

The spelling of 12561632 in words is "twelve million, five hundred sixty-one thousand, six hundred thirty-two".