12904655 has 4 divisors (see below), whose sum is σ = 15485592. Its totient is φ = 10323720.

The previous prime is 12904643. The next prime is 12904673. The reversal of 12904655 is 55640921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12904655 - 2⁸ = 12904399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290461 + ... + 1290470.

It is an arithmetic number, because the mean of its divisors is an integer number (3871398).

Almost surely, 2^12904655 is an apocalyptic number.

12904655 is a deficient number, since it is larger than the sum of its proper divisors (2580937).

12904655 is an equidigital number, since it uses as much as digits as its factorization.

12904655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580936.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 12904655 is about 3592.3049703498. The cubic root of 12904655 is about 234.5572166383.

The spelling of 12904655 in words is "twelve million, nine hundred four thousand, six hundred fifty-five".