12139157 has 8 divisors (see below), whose sum is σ = 13090560. Its totient is φ = 11219040.

The previous prime is 12139151. The next prime is 12139177. The reversal of 12139157 is 75193121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12139157 - 2¹⁸ = 11877013 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 (12139151) 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 7 ways as a sum of consecutive naturals, for example, 7013 + ... + 8570.

It is an arithmetic number, because the mean of its divisors is an integer number (1636320).

Almost surely, 2^12139157 is an apocalyptic number.

It is an amenable number.

12139157 is a deficient number, since it is larger than the sum of its proper divisors (951403).

12139157 is a wasteful number, since it uses less digits than its factorization.

12139157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15643.

The product of its digits is 1890, while the sum is 29.

The square root of 12139157 is about 3484.1293029967. The cubic root of 12139157 is about 229.8244217662.

The spelling of 12139157 in words is "twelve million, one hundred thirty-nine thousand, one hundred fifty-seven".