12397756 has 12 divisors (see below), whose sum is σ = 24795568. Its totient is φ = 5313312.

The previous prime is 12397753. The next prime is 12397771. The reversal of 12397756 is 65779321.

12397756 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397753) 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, 221361 + ... + 221416.

Almost surely, 2^12397756 is an apocalyptic number.

It is an amenable number.

12397756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12397756 is a wasteful number, since it uses less digits than its factorization.

12397756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442788 (or 442786 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 12397756 is about 3521.0447313262. The cubic root of 12397756 is about 231.4449424118. Note that the first 3 decimals are identical.

It can be divided in two parts, 123 and 97756, that added together give a palindrome (97879).

The spelling of 12397756 in words is "twelve million, three hundred ninety-seven thousand, seven hundred fifty-six".