12397539 has 72 divisors (see below), whose sum is σ = 22924944. Its totient is φ = 5913600.

The previous prime is 12397537. The next prime is 12397547. The reversal of 12397539 is 93579321.

It is not a de Polignac number, because 12397539 - 2¹ = 12397537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12397497 and 12397506.

It is not an unprimeable number, because it can be changed into a prime (12397537) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 302359 + ... + 302399.

It is an arithmetic number, because the mean of its divisors is an integer number (318402).

Almost surely, 2^12397539 is an apocalyptic number.

12397539 is a deficient number, since it is larger than the sum of its proper divisors (10527405).

12397539 is a wasteful number, since it uses less digits than its factorization.

12397539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 79 counting only the distinct ones).

The product of its digits is 51030, while the sum is 39.

The square root of 12397539 is about 3521.0139164735. The cubic root of 12397539 is about 231.4435920640.

It can be divided in two parts, 1239 and 7539, that added together give a palindrome (8778).

The spelling of 12397539 in words is "twelve million, three hundred ninety-seven thousand, five hundred thirty-nine".