12508609 has 2 divisors, whose sum is σ = 12508610. Its totient is φ = 12508608.

The previous prime is 12508607. The next prime is 12508633. The reversal of 12508609 is 90680521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10870209 + 1638400 = 3297^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12508609 - 2¹ = 12508607 is a prime.

It is a super-2 number, since 2×12508609² = 312930598229762, which contains 22 as substring.

Together with 12508607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12508603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254304 + 6254305.

It is an arithmetic number, because the mean of its divisors is an integer number (6254305).

Almost surely, 2^12508609 is an apocalyptic number.

It is an amenable number.

12508609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12508609 is an equidigital number, since it uses as much as digits as its factorization.

12508609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12508609 is about 3536.7511928322. The cubic root of 12508609 is about 232.1327087048.

The spelling of 12508609 in words is "twelve million, five hundred eight thousand, six hundred nine".