12156039 has 24 divisors (see below), whose sum is σ = 20211360. Its totient is φ = 6896448.

The previous prime is 12156031. The next prime is 12156043. The reversal of 12156039 is 93065121.

It is not a de Polignac number, because 12156039 - 2³ = 12156031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9277 + ... + 10505.

It is an arithmetic number, because the mean of its divisors is an integer number (842140).

Almost surely, 2^12156039 is an apocalyptic number.

12156039 is a deficient number, since it is larger than the sum of its proper divisors (8055321).

12156039 is a wasteful number, since it uses less digits than its factorization.

12156039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1396 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12156039 is about 3486.5511612480. The cubic root of 12156039 is about 229.9309118263.

The spelling of 12156039 in words is "twelve million, one hundred fifty-six thousand, thirty-nine".