13245809 has 2 divisors, whose sum is σ = 13245810. Its totient is φ = 13245808.

The previous prime is 13245731. The next prime is 13245811. The reversal of 13245809 is 90854231.

13245809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6630625 + 6615184 = 2575^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 13245809 - 2⁸ = 13245553 is a prime.

Together with 13245811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13245899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6622904 + 6622905.

It is an arithmetic number, because the mean of its divisors is an integer number (6622905).

Almost surely, 2^13245809 is an apocalyptic number.

It is an amenable number.

13245809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13245809 is an equidigital number, since it uses as much as digits as its factorization.

13245809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 13245809 is about 3639.4792209875. The cubic root of 13245809 is about 236.6062229649.

The spelling of 13245809 in words is "thirteen million, two hundred forty-five thousand, eight hundred nine".