12609005 has 8 divisors (see below), whose sum is σ = 15379224. Its totient is φ = 9921600.

The previous prime is 12608993. The next prime is 12609013. The reversal of 12609005 is 50090621.

12609005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 316969 + 12292036 = 563^2 + 3506^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12609005 - 2¹² = 12604909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20366 + ... + 20975.

It is an arithmetic number, because the mean of its divisors is an integer number (1922403).

Almost surely, 2^12609005 is an apocalyptic number.

It is an amenable number.

12609005 is a deficient number, since it is larger than the sum of its proper divisors (2770219).

12609005 is an equidigital number, since it uses as much as digits as its factorization.

12609005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41407.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12609005 is about 3550.9160789858. The cubic root of 12609005 is about 232.7520986949.

Adding to 12609005 its reverse (50090621), we get a palindrome (62699626).

The spelling of 12609005 in words is "twelve million, six hundred nine thousand, five".