13875281 has 12 divisors (see below), whose sum is σ = 17091108. Its totient is φ = 11192832.

The previous prime is 13875271. The next prime is 13875299. The reversal of 13875281 is 18257831.

13875281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12845056 + 1030225 = 3584^2 + 1015^2 .

It is not a de Polignac number, because 13875281 - 2⁶ = 13875217 is a prime.

It is a super-2 number, since 2×13875281² = 385046845657922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13875271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7496 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (1424259).

Almost surely, 2^13875281 is an apocalyptic number.

It is an amenable number.

13875281 is a deficient number, since it is larger than the sum of its proper divisors (3215827).

13875281 is a wasteful number, since it uses less digits than its factorization.

13875281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688 (or 16681 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 13875281 is about 3724.9538252172. The cubic root of 13875281 is about 240.2963988445.

The spelling of 13875281 in words is "thirteen million, eight hundred seventy-five thousand, two hundred eighty-one".