12135656 has 16 divisors (see below), whose sum is σ = 24504900. Its totient is φ = 5601024.

The previous prime is 12135611. The next prime is 12135677. The reversal of 12135656 is 65653121.

12135656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 122500 = 3466^2 + 350^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58241 + ... + 58448.

Almost surely, 2^12135656 is an apocalyptic number.

It is an amenable number.

12135656 is an abundant number, since it is smaller than the sum of its proper divisors (12369244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12135656 is a wasteful number, since it uses less digits than its factorization.

12135656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116708 (or 116704 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 12135656 is about 3483.6268456883. The cubic root of 12135656 is about 229.8023254304.

Adding to 12135656 its reverse (65653121), we get a palindrome (77788777).

The spelling of 12135656 in words is "twelve million, one hundred thirty-five thousand, six hundred fifty-six".