3924921 has 32 divisors (see below), whose sum is σ = 7031808. Its totient is φ = 1880640.

The previous prime is 3924901. The next prime is 3924929. The reversal of 3924921 is 1294293.

It is not a de Polignac number, because 3924921 - 2⁹ = 3924409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3924929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2350 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (219744).

Almost surely, 2^3924921 is an apocalyptic number.

It is an amenable number.

3924921 is a deficient number, since it is larger than the sum of its proper divisors (3106887).

3924921 is a wasteful number, since it uses less digits than its factorization.

3924921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its digits is 3888, while the sum is 30.

The square root of 3924921 is about 1981.1413377142. The cubic root of 3924921 is about 157.7406550271.

The spelling of 3924921 in words is "three million, nine hundred twenty-four thousand, nine hundred twenty-one".