12688157 has 4 divisors (see below), whose sum is σ = 13239840. Its totient is φ = 12136476.

The previous prime is 12688141. The next prime is 12688163. The reversal of 12688157 is 75188621.

12688157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 12688157 - 2⁴ = 12688141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12688157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688177) 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, 275807 + ... + 275852.

It is an arithmetic number, because the mean of its divisors is an integer number (3309960).

Almost surely, 2^12688157 is an apocalyptic number.

It is an amenable number.

12688157 is a deficient number, since it is larger than the sum of its proper divisors (551683).

12688157 is an equidigital number, since it uses as much as digits as its factorization.

12688157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551682.

The product of its digits is 26880, while the sum is 38.

The square root of 12688157 is about 3562.0439357201. The cubic root of 12688157 is about 233.2381105782.

The spelling of 12688157 in words is "twelve million, six hundred eighty-eight thousand, one hundred fifty-seven".