12655131 has 4 divisors (see below), whose sum is σ = 16873512. Its totient is φ = 8436752.

The previous prime is 12655127. The next prime is 12655141. The reversal of 12655131 is 13155621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12655131 - 2² = 12655127 is a prime.

It is a super-2 number, since 2×12655131² = 320304681254322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12655141) 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, 2109186 + ... + 2109191.

It is an arithmetic number, because the mean of its divisors is an integer number (4218378).

Almost surely, 2^12655131 is an apocalyptic number.

12655131 is a deficient number, since it is larger than the sum of its proper divisors (4218381).

12655131 is an equidigital number, since it uses as much as digits as its factorization.

12655131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218380.

The product of its digits is 900, while the sum is 24.

The square root of 12655131 is about 3557.4050936040. The cubic root of 12655131 is about 233.0355696094.

The spelling of 12655131 in words is "twelve million, six hundred fifty-five thousand, one hundred thirty-one".