12439597 has 4 divisors (see below), whose sum is σ = 13171356. Its totient is φ = 11707840.

The previous prime is 12439591. The next prime is 12439601. The reversal of 12439597 is 79593421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79593421 = 1213 ⋅65617.

It can be written as a sum of positive squares in 2 ways, for example, as 5982916 + 6456681 = 2446^2 + 2541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12439597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365854 + ... + 365887.

It is an arithmetic number, because the mean of its divisors is an integer number (3292839).

Almost surely, 2^12439597 is an apocalyptic number.

12439597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12439597 is a deficient number, since it is larger than the sum of its proper divisors (731759).

12439597 is an equidigital number, since it uses as much as digits as its factorization.

12439597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731758.

The product of its digits is 68040, while the sum is 40.

The square root of 12439597 is about 3526.9812871633. The cubic root of 12439597 is about 231.7050167406.

The spelling of 12439597 in words is "twelve million, four hundred thirty-nine thousand, five hundred ninety-seven".