12518609 has 2 divisors, whose sum is σ = 12518610. Its totient is φ = 12518608.

The previous prime is 12518599. The next prime is 12518621. The reversal of 12518609 is 90681521.

12518609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9628609 + 2890000 = 3103^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 12518609 - 2⁴ = 12518593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12518659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6259304 + 6259305.

It is an arithmetic number, because the mean of its divisors is an integer number (6259305).

Almost surely, 2^12518609 is an apocalyptic number.

It is an amenable number.

12518609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12518609 is an equidigital number, since it uses as much as digits as its factorization.

12518609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12518609 is about 3538.1646372095. The cubic root of 12518609 is about 232.1945516795.

The spelling of 12518609 in words is "twelve million, five hundred eighteen thousand, six hundred nine".