12904426 has 12 divisors (see below), whose sum is σ = 20236482. Its totient is φ = 6171176.

The previous prime is 12904399. The next prime is 12904447. The reversal of 12904426 is 62440921.

12904426 = 398² + 399² + ... + 466².

It can be written as a sum of positive squares in only one way, i.e., 9928801 + 2975625 = 3151^2 + 1725^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12904394 and 12904403.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5041 + ... + 7156.

Almost surely, 2^12904426 is an apocalyptic number.

12904426 is a deficient number, since it is larger than the sum of its proper divisors (7332056).

12904426 is a wasteful number, since it uses less digits than its factorization.

12904426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12245 (or 12222 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 12904426 is about 3592.2730965226. The cubic root of 12904426 is about 234.5558291824. Note that the first 3 decimals are identical.

The spelling of 12904426 in words is "twelve million, nine hundred four thousand, four hundred twenty-six".