12904397 has 4 divisors (see below), whose sum is σ = 14077536. Its totient is φ = 11731260.

The previous prime is 12904373. The next prime is 12904399. The reversal of 12904397 is 79340921.

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 12904397 - 2⁸ = 12904141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12904399) 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, 586553 + ... + 586574.

It is an arithmetic number, because the mean of its divisors is an integer number (3519384).

Almost surely, 2^12904397 is an apocalyptic number.

It is an amenable number.

12904397 is a deficient number, since it is larger than the sum of its proper divisors (1173139).

12904397 is a wasteful number, since it uses less digits than its factorization.

12904397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173138.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 12904397 is about 3592.2690600789. The cubic root of 12904397 is about 234.5556534772. Note that the first 3 decimals are identical.

It can be divided in two parts, 12 and 904397, that added together give a palindrome (904409).

The spelling of 12904397 in words is "twelve million, nine hundred four thousand, three hundred ninety-seven".