12986312 has 8 divisors (see below), whose sum is σ = 24349350. Its totient is φ = 6493152.

The previous prime is 12986279. The next prime is 12986333. The reversal of 12986312 is 21368921.

It can be written as a sum of positive squares in only one way, i.e., 10407076 + 2579236 = 3226^2 + 1606^2 .

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

It is a super-2 number, since 2×12986312² = 337288598722688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811637 + ... + 811652.

Almost surely, 2^12986312 is an apocalyptic number.

It is an amenable number.

12986312 is a deficient number, since it is larger than the sum of its proper divisors (11363038).

12986312 is a wasteful number, since it uses less digits than its factorization.

12986312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623295 (or 1623291 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 12986312 is about 3603.6525914688. The cubic root of 12986312 is about 235.0509139722.

The spelling of 12986312 in words is "twelve million, nine hundred eighty-six thousand, three hundred twelve".