12557992 has 8 divisors (see below), whose sum is σ = 23546250. Its totient is φ = 6278992.

The previous prime is 12557981. The next prime is 12558017. The reversal of 12557992 is 29975521.

It can be written as a sum of positive squares in only one way, i.e., 12432676 + 125316 = 3526^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784867 + ... + 784882.

Almost surely, 2^12557992 is an apocalyptic number.

It is an amenable number.

12557992 is a deficient number, since it is larger than the sum of its proper divisors (10988258).

12557992 is a wasteful number, since it uses less digits than its factorization.

12557992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569755 (or 1569751 counting only the distinct ones).

The product of its digits is 56700, while the sum is 40.

The square root of 12557992 is about 3543.7257230209. The cubic root of 12557992 is about 232.4377881108.

The spelling of 12557992 in words is "twelve million, five hundred fifty-seven thousand, nine hundred ninety-two".