12057657 has 4 divisors (see below), whose sum is σ = 16076880. Its totient is φ = 8038436.

The previous prime is 12057637. The next prime is 12057713. The reversal of 12057657 is 75675021.

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: 75675021 = 3 ⋅25225007.

It is a cyclic number.

It is not a de Polignac number, because 12057657 - 2⁶ = 12057593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12057637) 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, 2009607 + ... + 2009612.

It is an arithmetic number, because the mean of its divisors is an integer number (4019220).

Almost surely, 2^12057657 is an apocalyptic number.

It is an amenable number.

12057657 is a deficient number, since it is larger than the sum of its proper divisors (4019223).

12057657 is an equidigital number, since it uses as much as digits as its factorization.

12057657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019222.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 12057657 is about 3472.4137138308. The cubic root of 12057657 is about 229.3089338694.

The spelling of 12057657 in words is "twelve million, fifty-seven thousand, six hundred fifty-seven".