3910221 has 32 divisors (see below), whose sum is σ = 7015680. Its totient is φ = 2101248.

The previous prime is 3910201. The next prime is 3910229. The reversal of 3910221 is 1220193.

It is a happy number.

It is not a de Polignac number, because 3910221 - 2⁹ = 3909709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3910194 and 3910203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3910229) 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 31 ways as a sum of consecutive naturals, for example, 2605 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

Almost surely, 2^3910221 is an apocalyptic number.

It is an amenable number.

3910221 is a deficient number, since it is larger than the sum of its proper divisors (3105459).

3910221 is a wasteful number, since it uses less digits than its factorization.

3910221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 3910221 is about 1977.4278747909. The cubic root of 3910221 is about 157.5434800591.

The spelling of 3910221 in words is "three million, nine hundred ten thousand, two hundred twenty-one".