13422391 has 4 divisors (see below), whose sum is σ = 13524984. Its totient is φ = 13319800.

The previous prime is 13422371. The next prime is 13422397. The reversal of 13422391 is 19322431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13422391 - 2⁷ = 13422263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13422397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51100 + ... + 51361.

It is an arithmetic number, because the mean of its divisors is an integer number (3381246).

Almost surely, 2^13422391 is an apocalyptic number.

13422391 is a deficient number, since it is larger than the sum of its proper divisors (102593).

13422391 is a wasteful number, since it uses less digits than its factorization.

13422391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102592.

The product of its digits is 1296, while the sum is 25.

The square root of 13422391 is about 3663.6581445326. The cubic root of 13422391 is about 237.6529968942.

The spelling of 13422391 in words is "thirteen million, four hundred twenty-two thousand, three hundred ninety-one".