12305609 has 4 divisors (see below), whose sum is σ = 12334080. Its totient is φ = 12277140.

The previous prime is 12305581. The next prime is 12305627. The reversal of 12305609 is 90650321.

12305609 is digitally balanced in base 3, 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 12305609 - 2¹⁶ = 12240073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12305659) 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 3 ways as a sum of consecutive naturals, for example, 13577 + ... + 14454.

It is an arithmetic number, because the mean of its divisors is an integer number (3083520).

Almost surely, 2^12305609 is an apocalyptic number.

It is an amenable number.

12305609 is a deficient number, since it is larger than the sum of its proper divisors (28471).

12305609 is an equidigital number, since it uses as much as digits as its factorization.

12305609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28470.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 12305609 is about 3507.9351476331. The cubic root of 12305609 is about 230.8701068179.

The spelling of 12305609 in words is "twelve million, three hundred five thousand, six hundred nine".