13402281 has 8 divisors (see below), whose sum is σ = 17887744. Its totient is φ = 8925840.

The previous prime is 13402253. The next prime is 13402297. The reversal of 13402281 is 18220431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13402281 - 2¹³ = 13394089 is a prime.

It is a super-2 number, since 2×13402281² = 359242272005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13400281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2895 + ... + 5931.

It is an arithmetic number, because the mean of its divisors is an integer number (2235968).

Almost surely, 2^13402281 is an apocalyptic number.

It is an amenable number.

13402281 is a deficient number, since it is larger than the sum of its proper divisors (4485463).

13402281 is a wasteful number, since it uses less digits than its factorization.

13402281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 13402281 is about 3660.9125911445. The cubic root of 13402281 is about 237.5342502775.

The spelling of 13402281 in words is "thirteen million, four hundred two thousand, two hundred eighty-one".