13260509 has 2 divisors, whose sum is σ = 13260510. Its totient is φ = 13260508.

The previous prime is 13260503. The next prime is 13260521. The reversal of 13260509 is 90506231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 4937284 = 2885^2 + 2222^2 .

It is an emirp because it is prime and its reverse (90506231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13260509 - 2⁸ = 13260253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13260503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630254 + 6630255.

It is an arithmetic number, because the mean of its divisors is an integer number (6630255).

Almost surely, 2^13260509 is an apocalyptic number.

It is an amenable number.

13260509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13260509 is an equidigital number, since it uses as much as digits as its factorization.

13260509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13260509 is about 3641.4981806943. The cubic root of 13260509 is about 236.6937179509.

The spelling of 13260509 in words is "thirteen million, two hundred sixty thousand, five hundred nine".