12943904 has 12 divisors (see below), whose sum is σ = 25483374. Its totient is φ = 6471936.

The previous prime is 12943901. The next prime is 12943927. The reversal of 12943904 is 40934921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6492304 + 6451600 = 2548^2 + 2540^2 .

It is a super-2 number, since 2×12943904² = 335089301522432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 404497 = 12943904 / (1 + 2 + 9 + 4 + 3 + 9 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (12943901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202217 + ... + 202280.

Almost surely, 2^12943904 is an apocalyptic number.

It is an amenable number.

12943904 is a deficient number, since it is larger than the sum of its proper divisors (12539470).

12943904 is an equidigital number, since it uses as much as digits as its factorization.

12943904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404507 (or 404499 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12943904 is about 3597.7637498869. The cubic root of 12943904 is about 234.7947748054.

The spelling of 12943904 in words is "twelve million, nine hundred forty-three thousand, nine hundred four".