12856357 has 4 divisors (see below), whose sum is σ = 12981280. Its totient is φ = 12731436.

The previous prime is 12856339. The next prime is 12856373. The reversal of 12856357 is 75365821.

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 a de Polignac number, because none of the positive numbers 2^k-12856357 is a prime.

It is a super-2 number, since 2×12856357² = 330571830622898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856387) 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, 62307 + ... + 62512.

It is an arithmetic number, because the mean of its divisors is an integer number (3245320).

Almost surely, 2^12856357 is an apocalyptic number.

It is an amenable number.

12856357 is a deficient number, since it is larger than the sum of its proper divisors (124923).

12856357 is a wasteful number, since it uses less digits than its factorization.

12856357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124922.

The product of its digits is 50400, while the sum is 37.

The square root of 12856357 is about 3585.5762437856. The cubic root of 12856357 is about 234.2642265745.

The spelling of 12856357 in words is "twelve million, eight hundred fifty-six thousand, three hundred fifty-seven".