13158509 has 24 divisors (see below), whose sum is σ = 16689600. Its totient is φ = 10365264.

The previous prime is 13158503. The next prime is 13158517. The reversal of 13158509 is 90585131.

It is not a de Polignac number, because 13158509 - 2¹⁶ = 13092973 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 (13158503) 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 23 ways as a sum of consecutive naturals, for example, 57854 + ... + 58080.

It is an arithmetic number, because the mean of its divisors is an integer number (695400).

Almost surely, 2^13158509 is an apocalyptic number.

It is an amenable number.

13158509 is a deficient number, since it is larger than the sum of its proper divisors (3531091).

13158509 is an equidigital number, since it uses as much as digits as its factorization.

13158509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 13158509 is about 3627.4659198950. The cubic root of 13158509 is about 236.0852715416.

The spelling of 13158509 in words is "thirteen million, one hundred fifty-eight thousand, five hundred nine".