12606609 has 4 divisors (see below), whose sum is σ = 16808816. Its totient is φ = 8404404.

The previous prime is 12606593. The next prime is 12606623. The reversal of 12606609 is 90660621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90660621 = 3 ⋅30220207.

It is not a de Polignac number, because 12606609 - 2⁴ = 12606593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12606409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101099 + ... + 2101104.

It is an arithmetic number, because the mean of its divisors is an integer number (4202204).

Almost surely, 2^12606609 is an apocalyptic number.

It is an amenable number.

12606609 is a deficient number, since it is larger than the sum of its proper divisors (4202207).

12606609 is an equidigital number, since it uses as much as digits as its factorization.

12606609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202206.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 12606609 is about 3550.5786852286. The cubic root of 12606609 is about 232.7373550162.

The spelling of 12606609 in words is "twelve million, six hundred six thousand, six hundred nine".