13912281 has 6 divisors (see below), whose sum is σ = 20095530. Its totient is φ = 9274848.

The previous prime is 13912277. The next prime is 13912291. The reversal of 13912281 is 18221931.

13912281 is digitally balanced in base 3, 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 only one way, i.e., 12362256 + 1550025 = 3516^2 + 1245^2 .

It is not a de Polignac number, because 13912281 - 2² = 13912277 is a prime.

It is a super-2 number, since 2×13912281² = 387103125245922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13912201) 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, 772896 + ... + 772913.

It is an arithmetic number, because the mean of its divisors is an integer number (3349255).

Almost surely, 2^13912281 is an apocalyptic number.

It is an amenable number.

13912281 is a deficient number, since it is larger than the sum of its proper divisors (6183249).

13912281 is a wasteful number, since it uses less digits than its factorization.

13912281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545815 (or 1545812 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 13912281 is about 3729.9170232057. The cubic root of 13912281 is about 240.5098017423.

The spelling of 13912281 in words is "thirteen million, nine hundred twelve thousand, two hundred eighty-one".