12631136 has 96 divisors (see below), whose sum is σ = 31352832. Its totient is φ = 4884480.

The previous prime is 12631111. The next prime is 12631141. The reversal of 12631136 is 63113621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117995 + ... + 118101.

It is an arithmetic number, because the mean of its divisors is an integer number (326592).

Almost surely, 2^12631136 is an apocalyptic number.

12631136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12631136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15676416).

12631136 is an abundant number, since it is smaller than the sum of its proper divisors (18721696).

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

12631136 is a wasteful number, since it uses less digits than its factorization.

12631136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 164 counting only the distinct ones).

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

The square root of 12631136 is about 3554.0309509063. The cubic root of 12631136 is about 232.8881925944. Note that the first 3 decimals are identical.

Adding to 12631136 its reverse (63113621), we get a palindrome (75744757).

The spelling of 12631136 in words is "twelve million, six hundred thirty-one thousand, one hundred thirty-six".