12515992 has 8 divisors (see below), whose sum is σ = 23467500. Its totient is φ = 6257992.

The previous prime is 12515963. The next prime is 12515999. The reversal of 12515992 is 29951521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782242 + ... + 782257.

Almost surely, 2^12515992 is an apocalyptic number.

It is an amenable number.

12515992 is a deficient number, since it is larger than the sum of its proper divisors (10951508).

12515992 is a wasteful number, since it uses less digits than its factorization.

12515992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564505 (or 1564501 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 12515992 is about 3537.7947933706. The cubic root of 12515992 is about 232.1783705556.

It can be divided in two parts, 125 and 15992, that multiplied together give a triangular number (1999000 = T₁₉₉₉).

The spelling of 12515992 in words is "twelve million, five hundred fifteen thousand, nine hundred ninety-two".