3910021 has 4 divisors (see below), whose sum is σ = 3925152. Its totient is φ = 3894892.

The previous prime is 3910019. The next prime is 3910031. The reversal of 3910021 is 1200193.

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.

It is a cyclic number.

It is not a de Polignac number, because 3910021 - 2¹ = 3910019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3909977 and 3910004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3910001) 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, 7171 + ... + 7696.

It is an arithmetic number, because the mean of its divisors is an integer number (981288).

Almost surely, 2^3910021 is an apocalyptic number.

It is an amenable number.

3910021 is a deficient number, since it is larger than the sum of its proper divisors (15131).

3910021 is a wasteful number, since it uses less digits than its factorization.

3910021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 3910021 is about 1977.3773033996. The cubic root of 3910021 is about 157.5407940018.

The spelling of 3910021 in words is "three million, nine hundred ten thousand, twenty-one".