12507857 has 8 divisors (see below), whose sum is σ = 12804480. Its totient is φ = 12214720.

The previous prime is 12507839. The next prime is 12507863. The reversal of 12507857 is 75870521.

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 12507857 - 2²⁰ = 11459281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12507827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7244 + ... + 8802.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^12507857 is an apocalyptic number.

It is an amenable number.

12507857 is a deficient number, since it is larger than the sum of its proper divisors (296623).

12507857 is a wasteful number, since it uses less digits than its factorization.

12507857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 12507857 is about 3536.6448789778. The cubic root of 12507857 is about 232.1280567808.

The spelling of 12507857 in words is "twelve million, five hundred seven thousand, eight hundred fifty-seven".