12857915 has 8 divisors (see below), whose sum is σ = 17633760. Its totient is φ = 8816832.

The previous prime is 12857909. The next prime is 12857941. The reversal of 12857915 is 51975821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12857915 - 2⁸ = 12857659 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183650 + ... + 183719.

It is an arithmetic number, because the mean of its divisors is an integer number (2204220).

Almost surely, 2^12857915 is an apocalyptic number.

12857915 is a deficient number, since it is larger than the sum of its proper divisors (4775845).

12857915 is an equidigital number, since it uses as much as digits as its factorization.

12857915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367381.

The product of its digits is 25200, while the sum is 38.

The square root of 12857915 is about 3585.7934965639. The cubic root of 12857915 is about 234.2736893102.

The spelling of 12857915 in words is "twelve million, eight hundred fifty-seven thousand, nine hundred fifteen".