12657242 has 8 divisors (see below), whose sum is σ = 20446356. Its totient is φ = 5841792.

The previous prime is 12657223. The next prime is 12657247. The reversal of 12657242 is 24275621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12453841 + 203401 = 3529^2 + 451^2 .

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 (12657247) 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, 243383 + ... + 243434.

Almost surely, 2^12657242 is an apocalyptic number.

12657242 is a deficient number, since it is larger than the sum of its proper divisors (7789114).

12657242 is a wasteful number, since it uses less digits than its factorization.

12657242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486832.

The product of its digits is 6720, while the sum is 29.

The square root of 12657242 is about 3557.7017862660. The cubic root of 12657242 is about 233.0485264287.

The spelling of 12657242 in words is "twelve million, six hundred fifty-seven thousand, two hundred forty-two".