13157499 has 8 divisors (see below), whose sum is σ = 17704720. Its totient is φ = 8690976.

The previous prime is 13157497. The next prime is 13157537. The reversal of 13157499 is 99475131.

It is a happy number.

13157499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13157499 - 2¹ = 13157497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13157497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19792 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (2213090).

Almost surely, 2^13157499 is an apocalyptic number.

13157499 is a deficient number, since it is larger than the sum of its proper divisors (4547221).

13157499 is a wasteful number, since it uses less digits than its factorization.

13157499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40349.

The product of its digits is 34020, while the sum is 39.

The square root of 13157499 is about 3627.3267015807. The cubic root of 13157499 is about 236.0792310339.

It can be divided in two parts, 131 and 57499, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 13157499 in words is "thirteen million, one hundred fifty-seven thousand, four hundred ninety-nine".