13281256 has 16 divisors (see below), whose sum is σ = 24941700. Its totient is φ = 6630144.

The previous prime is 13281251. The next prime is 13281271. The reversal of 13281256 is 65218231.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 792100 = 3534^2 + 890^2 .

It is not an unprimeable number, because it can be changed into a prime (13281251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7776 + ... + 9328.

Almost surely, 2^13281256 is an apocalyptic number.

It is an amenable number.

13281256 is a deficient number, since it is larger than the sum of its proper divisors (11660444).

13281256 is a wasteful number, since it uses less digits than its factorization.

13281256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628 (or 2624 counting only the distinct ones).

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

The square root of 13281256 is about 3644.3457574714. The cubic root of 13281256 is about 236.8170949583.

Adding to 13281256 its reverse (65218231), we get a palindrome (78499487).

The spelling of 13281256 in words is "thirteen million, two hundred eighty-one thousand, two hundred fifty-six".