13266409 has 8 divisors (see below), whose sum is σ = 15127560. Its totient is φ = 11525376.

The previous prime is 13266397. The next prime is 13266413. The reversal of 13266409 is 90466231.

It can be written as a sum of positive squares in 4 ways, for example, as 5895184 + 7371225 = 2428^2 + 2715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13266409 - 2⁹ = 13265897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13266439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29794 + ... + 30235.

It is an arithmetic number, because the mean of its divisors is an integer number (1890945).

Almost surely, 2^13266409 is an apocalyptic number.

It is an amenable number.

13266409 is a deficient number, since it is larger than the sum of its proper divisors (1861151).

13266409 is a wasteful number, since it uses less digits than its factorization.

13266409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60059.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13266409 is about 3642.3081967346. The cubic root of 13266409 is about 236.7288168015.

The spelling of 13266409 in words is "thirteen million, two hundred sixty-six thousand, four hundred nine".