13306505 has 16 divisors (see below), whose sum is σ = 16649280. Its totient is φ = 10196928.

The previous prime is 13306493. The next prime is 13306507. The reversal of 13306505 is 50560331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13306505 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13306507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23354 + ... + 23916.

It is an arithmetic number, because the mean of its divisors is an integer number (1040580).

Almost surely, 2^13306505 is an apocalyptic number.

It is an amenable number.

13306505 is a deficient number, since it is larger than the sum of its proper divisors (3342775).

13306505 is a wasteful number, since it uses less digits than its factorization.

13306505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 13306505 is about 3647.8082460568. The cubic root of 13306505 is about 236.9670709768.

Adding to 13306505 its reverse (50560331), we get a palindrome (63866836).

The spelling of 13306505 in words is "thirteen million, three hundred six thousand, five hundred five".