15009 has 4 divisors (see below), whose sum is σ = 20016. Its totient is φ = 10004.

The previous prime is 14983. The next prime is 15013. The reversal of 15009 is 90051.

15009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15009 - 2⁸ = 14753 is a prime.

It is a D-number.

15009 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (15809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2499 + ... + 2504.

It is an arithmetic number, because the mean of its divisors is an integer number (5004).

2¹⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

15009 is a deficient number, since it is larger than the sum of its proper divisors (5007).

15009 is an equidigital number, since it uses as much as digits as its factorization.

15009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 15009 is about 122.5112239756. The cubic root of 15009 is about 24.6670521813.

The spelling of 15009 in words is "fifteen thousand, nine".