13286905 has 4 divisors (see below), whose sum is σ = 15944292. Its totient is φ = 10629520.

The previous prime is 13286891. The next prime is 13286927. The reversal of 13286905 is 50968231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3732624 + 9554281 = 1932^2 + 3091^2 .

It is not a de Polignac number, because 13286905 - 2⁹ = 13286393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328686 + ... + 1328695.

It is an arithmetic number, because the mean of its divisors is an integer number (3986073).

Almost surely, 2^13286905 is an apocalyptic number.

It is an amenable number.

13286905 is a deficient number, since it is larger than the sum of its proper divisors (2657387).

13286905 is an equidigital number, since it uses as much as digits as its factorization.

13286905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657386.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 13286905 is about 3645.1207113071. The cubic root of 13286905 is about 236.8506658331.

The spelling of 13286905 in words is "thirteen million, two hundred eighty-six thousand, nine hundred five".