12157839 has 24 divisors (see below), whose sum is σ = 18729360. Its totient is φ = 7573248.

The previous prime is 12157801. The next prime is 12157841. The reversal of 12157839 is 93875121.

12157839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12157839 - 2⁷ = 12157711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157879) 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 23 ways as a sum of consecutive naturals, for example, 34864 + ... + 35210.

It is an arithmetic number, because the mean of its divisors is an integer number (780390).

Almost surely, 2^12157839 is an apocalyptic number.

12157839 is a deficient number, since it is larger than the sum of its proper divisors (6571521).

12157839 is a wasteful number, since it uses less digits than its factorization.

12157839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 596 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12157839 is about 3486.8092864394. The cubic root of 12157839 is about 229.9422602383.

It can be divided in two parts, 12157 and 839, that added together give a square (12996 = 114²).

The spelling of 12157839 in words is "twelve million, one hundred fifty-seven thousand, eight hundred thirty-nine".