12815632 has 10 divisors (see below), whose sum is σ = 24830318. Its totient is φ = 6407808.

The previous prime is 12815611. The next prime is 12815641. The reversal of 12815632 is 23651821.

It can be written as a sum of positive squares in only one way, i.e., 9144576 + 3671056 = 3024^2 + 1916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12815632.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400473 + ... + 400504.

Almost surely, 2^12815632 is an apocalyptic number.

It is an amenable number.

12815632 is a deficient number, since it is larger than the sum of its proper divisors (12014686).

12815632 is an equidigital number, since it uses as much as digits as its factorization.

12815632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800985 (or 800979 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 12815632 is about 3579.8927358232. The cubic root of 12815632 is about 234.0166058296.

The spelling of 12815632 in words is "twelve million, eight hundred fifteen thousand, six hundred thirty-two".