12731996 has 12 divisors (see below), whose sum is σ = 22883448. Its totient is φ = 6193872.

The previous prime is 12731993. The next prime is 12732001. The reversal of 12731996 is 69913721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731993) 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, 42866 + ... + 43161.

It is an arithmetic number, because the mean of its divisors is an integer number (1906954).

Almost surely, 2^12731996 is an apocalyptic number.

It is an amenable number.

12731996 is a deficient number, since it is larger than the sum of its proper divisors (10151452).

12731996 is a wasteful number, since it uses less digits than its factorization.

12731996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86068 (or 86066 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 12731996 is about 3568.1922593941. The cubic root of 12731996 is about 233.5064230420.

It can be divided in two parts, 127 and 31996, that added together give a palindrome (32123).

The spelling of 12731996 in words is "twelve million, seven hundred thirty-one thousand, nine hundred ninety-six".