12688155 has 12 divisors (see below), whose sum is σ = 21992880. Its totient is φ = 6766992.

The previous prime is 12688141. The next prime is 12688163. The reversal of 12688155 is 55188621.

12688155 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12688155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140935 + ... + 141024.

It is an arithmetic number, because the mean of its divisors is an integer number (1832740).

Almost surely, 2^12688155 is an apocalyptic number.

12688155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12688155 is a deficient number, since it is larger than the sum of its proper divisors (9304725).

12688155 is a wasteful number, since it uses less digits than its factorization.

12688155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281970 (or 281967 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 12688155 is about 3562.0436549823. The cubic root of 12688155 is about 233.2380983233.

The spelling of 12688155 in words is "twelve million, six hundred eighty-eight thousand, one hundred fifty-five".