13239157 has 8 divisors (see below), whose sum is σ = 13495680. Its totient is φ = 12984720.

The previous prime is 13239137. The next prime is 13239199. The reversal of 13239157 is 75193231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13239157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13239137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18319 + ... + 19027.

It is an arithmetic number, because the mean of its divisors is an integer number (1686960).

Almost surely, 2^13239157 is an apocalyptic number.

It is an amenable number.

13239157 is a deficient number, since it is larger than the sum of its proper divisors (256523).

13239157 is an equidigital number, since it uses as much as digits as its factorization.

13239157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its digits is 5670, while the sum is 31.

The square root of 13239157 is about 3638.5652392117. The cubic root of 13239157 is about 236.5666087207.

The spelling of 13239157 in words is "thirteen million, two hundred thirty-nine thousand, one hundred fifty-seven".