13157409 has 16 divisors (see below), whose sum is σ = 18107712. Its totient is φ = 8493888.

The previous prime is 13157399. The next prime is 13157437. The reversal of 13157409 is 90475131.

13157409 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 13157409 - 2⁵ = 13157377 is a prime.

It is a super-3 number, since 3×13157409³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13157479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12699 + ... + 13695.

It is an arithmetic number, because the mean of its divisors is an integer number (1131732).

Almost surely, 2^13157409 is an apocalyptic number.

It is an amenable number.

13157409 is a deficient number, since it is larger than the sum of its proper divisors (4950303).

13157409 is an equidigital number, since it uses as much as digits as its factorization.

13157409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 13157409 is about 3627.3142957290. The cubic root of 13157409 is about 236.0786927558.

The spelling of 13157409 in words is "thirteen million, one hundred fifty-seven thousand, four hundred nine".