12865988 has 6 divisors (see below), whose sum is σ = 22515486. Its totient is φ = 6432992.

The previous prime is 12865969. The next prime is 12865997. The reversal of 12865988 is 88956821.

It can be written as a sum of positive squares in only one way, i.e., 10549504 + 2316484 = 3248^2 + 1522^2 .

It is a super-2 number, since 2×12865988² = 331067294432288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608245 + ... + 1608252.

It is an arithmetic number, because the mean of its divisors is an integer number (3752581).

Almost surely, 2^12865988 is an apocalyptic number.

It is an amenable number.

12865988 is a deficient number, since it is larger than the sum of its proper divisors (9649498).

12865988 is a wasteful number, since it uses less digits than its factorization.

12865988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216501 (or 3216499 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 12865988 is about 3586.9190121886. The cubic root of 12865988 is about 234.3227095909.

The spelling of 12865988 in words is "twelve million, eight hundred sixty-five thousand, nine hundred eighty-eight".