12912394 has 24 divisors (see below), whose sum is σ = 21474180. Its totient is φ = 5818560.

The previous prime is 12912391. The next prime is 12912413. The reversal of 12912394 is 49321921.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 131769 = 3575^2 + 363^2 .

It is a super-2 number, since 2×12912394² = 333459837622472, which contains 22 as substring.

Its product of digits (3888) is a multiple of the sum of its prime factors (486).

It is not an unprimeable number, because it can be changed into a prime (12912391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55302 + ... + 55534.

Almost surely, 2^12912394 is an apocalyptic number.

12912394 is a deficient number, since it is larger than the sum of its proper divisors (8561786).

12912394 is a wasteful number, since it uses less digits than its factorization.

12912394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 475 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 12912394 is about 3593.3819724599. The cubic root of 12912394 is about 234.6040957309.

The spelling of 12912394 in words is "twelve million, nine hundred twelve thousand, three hundred ninety-four".