13256905 has 8 divisors (see below), whose sum is σ = 15942600. Its totient is φ = 10582656.

The previous prime is 13256897. The next prime is 13256941. The reversal of 13256905 is 50965231.

It can be written as a sum of positive squares in 4 ways, for example, as 7011904 + 6245001 = 2648^2 + 2499^2 .

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 13256905 - 2³ = 13256897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (1992825).

Almost surely, 2^13256905 is an apocalyptic number.

It is an amenable number.

13256905 is a deficient number, since it is larger than the sum of its proper divisors (2685695).

13256905 is an equidigital number, since it uses as much as digits as its factorization.

13256905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

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

The square root of 13256905 is about 3641.0032957964. The cubic root of 13256905 is about 236.6722727848.

It can be divided in two parts, 13256 and 905, that added together give a square (14161 = 119²).

The spelling of 13256905 in words is "thirteen million, two hundred fifty-six thousand, nine hundred five".