13942221 has 16 divisors (see below), whose sum is σ = 19308288. Its totient is φ = 8942400.

The previous prime is 13942217. The next prime is 13942223. The reversal of 13942221 is 12224931.

It is not a de Polignac number, because 13942221 - 2² = 13942217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13942191 and 13942200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13942223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7791 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (1206768).

Almost surely, 2^13942221 is an apocalyptic number.

It is an amenable number.

13942221 is a deficient number, since it is larger than the sum of its proper divisors (5366067).

13942221 is a wasteful number, since it uses less digits than its factorization.

13942221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732.

The product of its digits is 864, while the sum is 24.

The square root of 13942221 is about 3733.9283603197. The cubic root of 13942221 is about 240.6822082676.

The spelling of 13942221 in words is "thirteen million, nine hundred forty-two thousand, two hundred twenty-one".