12911312 has 20 divisors (see below), whose sum is σ = 25089540. Its totient is φ = 6436608.

The previous prime is 12911287. The next prime is 12911329. The reversal of 12911312 is 21311921.

It can be written as a sum of positive squares in 2 ways, for example, as 7639696 + 5271616 = 2764^2 + 2296^2 .

It is a super-2 number, since 2×12911312² = 333403955122688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5558 + ... + 7530.

It is an arithmetic number, because the mean of its divisors is an integer number (1254477).

Almost surely, 2^12911312 is an apocalyptic number.

It is an amenable number.

12911312 is a deficient number, since it is larger than the sum of its proper divisors (12178228).

12911312 is a wasteful number, since it uses less digits than its factorization.

12911312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390 (or 2384 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 12911312 is about 3593.2314147575. The cubic root of 12911312 is about 234.5975426285.

The spelling of 12911312 in words is "twelve million, nine hundred eleven thousand, three hundred twelve".