13256281 has 6 divisors (see below), whose sum is σ = 13991082. Its totient is φ = 12558240.

The previous prime is 13256239. The next prime is 13256333. The reversal of 13256281 is 18265231.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 6579225 = 2584^2 + 2565^2 .

It is not a de Polignac number, because 13256281 - 2⁹ = 13255769 is a prime.

It is a super-2 number, since 2×13256281² = 351457971901922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13254281) 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 5 ways as a sum of consecutive naturals, for example, 18000 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (2331847).

Almost surely, 2^13256281 is an apocalyptic number.

It is an amenable number.

13256281 is a deficient number, since it is larger than the sum of its proper divisors (734801).

13256281 is an equidigital number, since it uses as much as digits as its factorization.

13256281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36759 (or 36740 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 13256281 is about 3640.9176041212. The cubic root of 13256281 is about 236.6685593536.

The spelling of 13256281 in words is "thirteen million, two hundred fifty-six thousand, two hundred eighty-one".