12904817 has 4 divisors (see below), whose sum is σ = 13465920. Its totient is φ = 12343716.

The previous prime is 12904813. The next prime is 12904841. The reversal of 12904817 is 71840921.

12904817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12904817 - 2² = 12904813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12904813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280517 + ... + 280562.

It is an arithmetic number, because the mean of its divisors is an integer number (3366480).

Almost surely, 2^12904817 is an apocalyptic number.

It is an amenable number.

12904817 is a deficient number, since it is larger than the sum of its proper divisors (561103).

12904817 is an equidigital number, since it uses as much as digits as its factorization.

12904817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561102.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12904817 is about 3592.3275184760. The cubic root of 12904817 is about 234.5581981474.

The spelling of 12904817 in words is "twelve million, nine hundred four thousand, eight hundred seventeen".