13265509 has 4 divisors (see below), whose sum is σ = 13589100. Its totient is φ = 12941920.

The previous prime is 13265507. The next prime is 13265519. The reversal of 13265509 is 90556231.

13265509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90556231 = 1471 ⋅61561.

It can be written as a sum of positive squares in 2 ways, for example, as 2722500 + 10543009 = 1650^2 + 3247^2 .

It is a cyclic number.

It is not a de Polignac number, because 13265509 - 2¹ = 13265507 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13265507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161734 + ... + 161815.

It is an arithmetic number, because the mean of its divisors is an integer number (3397275).

Almost surely, 2^13265509 is an apocalyptic number.

It is an amenable number.

13265509 is a deficient number, since it is larger than the sum of its proper divisors (323591).

13265509 is an equidigital number, since it uses as much as digits as its factorization.

13265509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323590.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 13265509 is about 3642.1846466098. The cubic root of 13265509 is about 236.7234634123.

The spelling of 13265509 in words is "thirteen million, two hundred sixty-five thousand, five hundred nine".