3921057 has 24 divisors (see below), whose sum is σ = 6543680. Its totient is φ = 2216160.

The previous prime is 3921037. The next prime is 3921059. The reversal of 3921057 is 7501293.

It is not a de Polignac number, because 3921057 - 2⁷ = 3920929 is a prime.

It is a Duffinian number.

3921057 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3921057.

It is not an unprimeable number, because it can be changed into a prime (3921059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6582 + ... + 7152.

Almost surely, 2^3921057 is an apocalyptic number.

It is an amenable number.

3921057 is a deficient number, since it is larger than the sum of its proper divisors (2622623).

3921057 is a wasteful number, since it uses less digits than its factorization.

3921057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 3921057 is about 1980.1659021405. The cubic root of 3921057 is about 157.6888739410.

The spelling of 3921057 in words is "three million, nine hundred twenty-one thousand, fifty-seven".