12731136 has 108 divisors (see below), whose sum is σ = 37515576. Its totient is φ = 3829760.

The previous prime is 12731129. The next prime is 12731161. The reversal of 12731136 is 63113721.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 92860 + ... + 92996.

Almost surely, 2^12731136 is an apocalyptic number.

12731136 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 12731136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18757788).

12731136 is an abundant number, since it is smaller than the sum of its proper divisors (24784440).

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

12731136 is a wasteful number, since it uses less digits than its factorization.

12731136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 153 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 12731136 is about 3568.0717481575. The cubic root of 12731136 is about 233.5011654205.

Adding to 12731136 its reverse (63113721), we get a palindrome (75844857).

The spelling of 12731136 in words is "twelve million, seven hundred thirty-one thousand, one hundred thirty-six".