12308857 has 4 divisors (see below), whose sum is σ = 13427856. Its totient is φ = 11189860.

The previous prime is 12308843. The next prime is 12308861. The reversal of 12308857 is 75880321.

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 de Polignac number, because none of the positive numbers 2^k-12308857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12308057) 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, 559483 + ... + 559504.

It is an arithmetic number, because the mean of its divisors is an integer number (3356964).

Almost surely, 2^12308857 is an apocalyptic number.

It is an amenable number.

12308857 is a deficient number, since it is larger than the sum of its proper divisors (1118999).

12308857 is a wasteful number, since it uses less digits than its factorization.

12308857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118998.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 12308857 is about 3508.3980674946. The cubic root of 12308857 is about 230.8904173430.

The spelling of 12308857 in words is "twelve million, three hundred eight thousand, eight hundred fifty-seven".