12957657 has 8 divisors (see below), whose sum is σ = 17330400. Its totient is φ = 8611680.

The previous prime is 12957653. The next prime is 12957661. The reversal of 12957657 is 75675921.

It is an interprime number because it is at equal distance from previous prime (12957653) and next prime (12957661).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12957657 - 2² = 12957653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12957653) 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, 5532 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (2166300).

Almost surely, 2^12957657 is an apocalyptic number.

It is an amenable number.

12957657 is a deficient number, since it is larger than the sum of its proper divisors (4372743).

12957657 is a wasteful number, since it uses less digits than its factorization.

12957657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13383.

The product of its digits is 132300, while the sum is 42.

The square root of 12957657 is about 3599.6745686242. The cubic root of 12957657 is about 234.8779024706.

The spelling of 12957657 in words is "twelve million, nine hundred fifty-seven thousand, six hundred fifty-seven".