13791421 has 8 divisors (see below), whose sum is σ = 16447104. Its totient is φ = 11307120.

The previous prime is 13791409. The next prime is 13791451. The reversal of 13791421 is 12419731.

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

It is a cyclic number.

It is not a de Polignac number, because 13791421 - 2⁵ = 13791389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13791421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13791451) 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 7 ways as a sum of consecutive naturals, for example, 42670 + ... + 42991.

It is an arithmetic number, because the mean of its divisors is an integer number (2055888).

Almost surely, 2^13791421 is an apocalyptic number.

It is an amenable number.

13791421 is a deficient number, since it is larger than the sum of its proper divisors (2655683).

13791421 is an equidigital number, since it uses as much as digits as its factorization.

13791421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85691.

The product of its digits is 1512, while the sum is 28.

The square root of 13791421 is about 3713.6802501023. The cubic root of 13791421 is about 239.8113158187.

The spelling of 13791421 in words is "thirteen million, seven hundred ninety-one thousand, four hundred twenty-one".