12561568 has 12 divisors (see below), whose sum is σ = 24730650. Its totient is φ = 6280768.

The previous prime is 12561551. The next prime is 12561599. The reversal of 12561568 is 86516521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9072144 + 3489424 = 3012^2 + 1868^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196243 + ... + 196306.

Almost surely, 2^12561568 is an apocalyptic number.

It is an amenable number.

12561568 is a deficient number, since it is larger than the sum of its proper divisors (12169082).

12561568 is an equidigital number, since it uses as much as digits as its factorization.

12561568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392559 (or 392551 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 12561568 is about 3544.2302408280. The cubic root of 12561568 is about 232.4598489266.

The spelling of 12561568 in words is "twelve million, five hundred sixty-one thousand, five hundred sixty-eight".