12239857 has 12 divisors (see below), whose sum is σ = 14988720. Its totient is φ = 9938376.

The previous prime is 12239839. The next prime is 12239861. The reversal of 12239857 is 75893221.

12239857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12239857 - 2⁷ = 12239729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12239897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5643 + ... + 7504.

It is an arithmetic number, because the mean of its divisors is an integer number (1249060).

Almost surely, 2^12239857 is an apocalyptic number.

It is an amenable number.

12239857 is a deficient number, since it is larger than the sum of its proper divisors (2748863).

12239857 is a wasteful number, since it uses less digits than its factorization.

12239857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180 (or 13173 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 12239857 is about 3498.5506999328. The cubic root of 12239857 is about 230.4581730138.

The spelling of 12239857 in words is "twelve million, two hundred thirty-nine thousand, eight hundred fifty-seven".