12657442 has 8 divisors (see below), whose sum is σ = 21698496. Its totient is φ = 5424612.

The previous prime is 12657419. The next prime is 12657443. The reversal of 12657442 is 24475621.

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

It is not an unprimeable number, because it can be changed into a prime (12657443) 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, 452038 + ... + 452065.

It is an arithmetic number, because the mean of its divisors is an integer number (2712312).

Almost surely, 2^12657442 is an apocalyptic number.

12657442 is a deficient number, since it is larger than the sum of its proper divisors (9041054).

12657442 is an equidigital number, since it uses as much as digits as its factorization.

12657442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904112.

The product of its digits is 13440, while the sum is 31.

The square root of 12657442 is about 3557.7298941881. The cubic root of 12657442 is about 233.0497539068.

The spelling of 12657442 in words is "twelve million, six hundred fifty-seven thousand, four hundred forty-two".