13256705 has 24 divisors (see below), whose sum is σ = 20191680. Its totient is φ = 8262240.

The previous prime is 13256701. The next prime is 13256707. The reversal of 13256705 is 50765231.

It is not a de Polignac number, because 13256705 - 2² = 13256701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13256701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (841320).

Almost surely, 2^13256705 is an apocalyptic number.

It is an amenable number.

13256705 is a deficient number, since it is larger than the sum of its proper divisors (6934975).

13256705 is a wasteful number, since it uses less digits than its factorization.

13256705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949 (or 4942 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 13256705 is about 3640.9758307355. The cubic root of 13256705 is about 236.6710825952.

The spelling of 13256705 in words is "thirteen million, two hundred fifty-six thousand, seven hundred five".