13941221 has 4 divisors (see below), whose sum is σ = 15932832. Its totient is φ = 11949612.

The previous prime is 13941211. The next prime is 13941223. The reversal of 13941221 is 12214931.

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: 12214931 = 739 ⋅16529.

It is a cyclic number.

It is not a de Polignac number, because 13941221 - 2¹⁸ = 13679077 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 (13941223) 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, 995795 + ... + 995808.

It is an arithmetic number, because the mean of its divisors is an integer number (3983208).

Almost surely, 2^13941221 is an apocalyptic number.

It is an amenable number.

13941221 is a deficient number, since it is larger than the sum of its proper divisors (1991611).

13941221 is an equidigital number, since it uses as much as digits as its factorization.

13941221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991610.

The product of its digits is 432, while the sum is 23.

The square root of 13941221 is about 3733.7944506895. The cubic root of 13941221 is about 240.6764538530.

The spelling of 13941221 in words is "thirteen million, nine hundred forty-one thousand, two hundred twenty-one".