12657157 has 4 divisors (see below), whose sum is σ = 12673836. Its totient is φ = 12640480.

The previous prime is 12657131. The next prime is 12657167. The reversal of 12657157 is 75175621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75175621 = 449 ⋅167429.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 3207681 = 3074^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 12657157 - 2¹⁵ = 12624389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144 + ... + 8737.

It is an arithmetic number, because the mean of its divisors is an integer number (3168459).

Almost surely, 2^12657157 is an apocalyptic number.

It is an amenable number.

12657157 is a deficient number, since it is larger than the sum of its proper divisors (16679).

12657157 is an equidigital number, since it uses as much as digits as its factorization.

12657157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16678.

The product of its digits is 14700, while the sum is 34.

The square root of 12657157 is about 3557.6898403318. The cubic root of 12657157 is about 233.0480047467.

The spelling of 12657157 in words is "twelve million, six hundred fifty-seven thousand, one hundred fifty-seven".