13994221 has 4 divisors (see below), whose sum is σ = 14319712. Its totient is φ = 13668732.

The previous prime is 13994219. The next prime is 13994231. The reversal of 13994221 is 12249931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12249931 = 139 ⋅88129.

It is a cyclic number.

It is not a de Polignac number, because 13994221 - 2¹ = 13994219 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 (13994231) 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 3 ways as a sum of consecutive naturals, for example, 162681 + ... + 162766.

It is an arithmetic number, because the mean of its divisors is an integer number (3579928).

Almost surely, 2^13994221 is an apocalyptic number.

It is an amenable number.

13994221 is a deficient number, since it is larger than the sum of its proper divisors (325491).

13994221 is an equidigital number, since it uses as much as digits as its factorization.

13994221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325490.

The product of its digits is 3888, while the sum is 31.

The square root of 13994221 is about 3740.8850557054. The cubic root of 13994221 is about 240.9810594436.

The spelling of 13994221 in words is "thirteen million, nine hundred ninety-four thousand, two hundred twenty-one".