13281281 has 16 divisors (see below), whose sum is σ = 15286656. Its totient is φ = 11442816.

The previous prime is 13281271. The next prime is 13281283. The reversal of 13281281 is 18218231.

It is not a de Polignac number, because 13281281 - 2¹⁰ = 13280257 is a prime.

It is a super-2 number, since 2×13281281² = 352784850001922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13281281.

It is not an unprimeable number, because it can be changed into a prime (13281283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12341 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (955416).

Almost surely, 2^13281281 is an apocalyptic number.

It is an amenable number.

13281281 is a deficient number, since it is larger than the sum of its proper divisors (2005375).

13281281 is a wasteful number, since it uses less digits than its factorization.

13281281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its digits is 768, while the sum is 26.

The square root of 13281281 is about 3644.3491874407. The cubic root of 13281281 is about 236.8172435493.

The spelling of 13281281 in words is "thirteen million, two hundred eighty-one thousand, two hundred eighty-one".