12131636 has 12 divisors (see below), whose sum is σ = 23160480. Its totient is φ = 5514360.

The previous prime is 12131629. The next prime is 12131641. The reversal of 12131636 is 63613121.

It is a happy number.

12131636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 137816 + ... + 137903.

It is an arithmetic number, because the mean of its divisors is an integer number (1930040).

Almost surely, 2^12131636 is an apocalyptic number.

It is an amenable number.

12131636 is a deficient number, since it is larger than the sum of its proper divisors (11028844).

12131636 is a wasteful number, since it uses less digits than its factorization.

12131636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275734 (or 275732 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 12131636 is about 3483.0498130231. The cubic root of 12131636 is about 229.7769482177.

Adding to 12131636 its reverse (63613121), we get a palindrome (75744757).

The spelling of 12131636 in words is "twelve million, one hundred thirty-one thousand, six hundred thirty-six".