15120609 has 16 divisors (see below), whose sum is σ = 23272320. Its totient is φ = 8553600.

The previous prime is 15120607. The next prime is 15120613. The reversal of 15120609 is 90602151.

It is not a de Polignac number, because 15120609 - 2¹ = 15120607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15120601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1444 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (1454520).

Almost surely, 2^15120609 is an apocalyptic number.

It is an amenable number.

15120609 is a deficient number, since it is larger than the sum of its proper divisors (8151711).

15120609 is a wasteful number, since it uses less digits than its factorization.

15120609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 15120609 is about 3888.5227272063. The cubic root of 15120609 is about 247.2804378682.

The spelling of 15120609 in words is "fifteen million, one hundred twenty thousand, six hundred nine".