13926221 has 4 divisors (see below), whose sum is σ = 14659200. Its totient is φ = 13193244.

The previous prime is 13926197. The next prime is 13926229. The reversal of 13926221 is 12262931.

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: 12262931 = 181 ⋅67751.

It is a cyclic number.

It is not a de Polignac number, because 13926221 - 2¹⁴ = 13909837 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 (13926229) 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, 366461 + ... + 366498.

It is an arithmetic number, because the mean of its divisors is an integer number (3664800).

Almost surely, 2^13926221 is an apocalyptic number.

It is an amenable number.

13926221 is a deficient number, since it is larger than the sum of its proper divisors (732979).

13926221 is an equidigital number, since it uses as much as digits as its factorization.

13926221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732978.

The product of its digits is 1296, while the sum is 26.

The square root of 13926221 is about 3731.7852296187. The cubic root of 13926221 is about 240.5901045928.

The spelling of 13926221 in words is "thirteen million, nine hundred twenty-six thousand, two hundred twenty-one".