12555609 has 16 divisors (see below), whose sum is σ = 18333120. Its totient is φ = 7580160.

The previous prime is 12555607. The next prime is 12555629. The reversal of 12555609 is 90655521.

It is not a de Polignac number, because 12555609 - 2¹ = 12555607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 12555609.

It is not an unprimeable number, because it can be changed into a prime (12555607) 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, 10557 + ... + 11685.

It is an arithmetic number, because the mean of its divisors is an integer number (1145820).

Almost surely, 2^12555609 is an apocalyptic number.

It is an amenable number.

12555609 is a deficient number, since it is larger than the sum of its proper divisors (5777511).

12555609 is a wasteful number, since it uses less digits than its factorization.

12555609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 12555609 is about 3543.3894790158. The cubic root of 12555609 is about 232.4230847440.

The spelling of 12555609 in words is "twelve million, five hundred fifty-five thousand, six hundred nine".