12312857 has 4 divisors (see below), whose sum is σ = 12388560. Its totient is φ = 12237156.

The previous prime is 12312851. The next prime is 12312863. The reversal of 12312857 is 75821321.

12312857 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 75821321 = 4153 ⋅18257.

It is an interprime number because it is at equal distance from previous prime (12312851) and next prime (12312863).

It is a cyclic number.

It is not a de Polignac number, because 12312857 - 2²² = 8118553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312851) by changing a digit.

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, 37607 + ... + 37932.

It is an arithmetic number, because the mean of its divisors is an integer number (3097140).

Almost surely, 2^12312857 is an apocalyptic number.

It is an amenable number.

12312857 is a deficient number, since it is larger than the sum of its proper divisors (75703).

12312857 is an equidigital number, since it uses as much as digits as its factorization.

12312857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75702.

The product of its digits is 3360, while the sum is 29.

The square root of 12312857 is about 3508.9680819295. The cubic root of 12312857 is about 230.9154253960.

The spelling of 12312857 in words is "twelve million, three hundred twelve thousand, eight hundred fifty-seven".