12158509 has 8 divisors (see below), whose sum is σ = 13587840. Its totient is φ = 10783200.

The previous prime is 12158507. The next prime is 12158521. The reversal of 12158509 is 90585121.

12158509 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 a cyclic number.

It is not a de Polignac number, because 12158509 - 2¹ = 12158507 is a prime.

It is a super-2 number, since 2×12158509² = 295658682206162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12158501) 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, 13029 + ... + 13930.

It is an arithmetic number, because the mean of its divisors is an integer number (1698480).

Almost surely, 2^12158509 is an apocalyptic number.

It is an amenable number.

12158509 is a deficient number, since it is larger than the sum of its proper divisors (1429331).

12158509 is a wasteful number, since it uses less digits than its factorization.

12158509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27011.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12158509 is about 3486.9053614918. The cubic root of 12158509 is about 229.9464840833.

The spelling of 12158509 in words is "twelve million, one hundred fifty-eight thousand, five hundred nine".