13807281 has 16 divisors (see below), whose sum is σ = 20520000. Its totient is φ = 8206848.

The previous prime is 13807279. The next prime is 13807301. The reversal of 13807281 is 18270831.

It is a happy number.

It is not a de Polignac number, because 13807281 - 2¹ = 13807279 is a prime.

It is a super-2 number, since 2×13807281² = 381282017225922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13807231) 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 15 ways as a sum of consecutive naturals, for example, 6156 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (1282500).

Almost surely, 2^13807281 is an apocalyptic number.

It is an amenable number.

13807281 is a deficient number, since it is larger than the sum of its proper divisors (6712719).

13807281 is a wasteful number, since it uses less digits than its factorization.

13807281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13807281 is about 3715.8149846299. The cubic root of 13807281 is about 239.9032074964.

The spelling of 13807281 in words is "thirteen million, eight hundred seven thousand, two hundred eighty-one".