13256945 has 8 divisors (see below), whose sum is σ = 17132136. Its totient is φ = 9789696.

The previous prime is 13256941. The next prime is 13256959. The reversal of 13256945 is 54965231.

It can be written as a sum of positive squares in 4 ways, for example, as 1940449 + 11316496 = 1393^2 + 3364^2 .

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 13256945 - 2² = 13256941 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13256941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101912 + ... + 102041.

It is an arithmetic number, because the mean of its divisors is an integer number (2141517).

Almost surely, 2^13256945 is an apocalyptic number.

It is an amenable number.

13256945 is a deficient number, since it is larger than the sum of its proper divisors (3875191).

13256945 is a wasteful number, since it uses less digits than its factorization.

13256945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203971.

The product of its digits is 32400, while the sum is 35.

The square root of 13256945 is about 3641.0087887837. The cubic root of 13256945 is about 236.6725108213.

The spelling of 13256945 in words is "thirteen million, two hundred fifty-six thousand, nine hundred forty-five".