3921564 has 24 divisors (see below), whose sum is σ = 9208080. Its totient is φ = 1298944.

The previous prime is 3921559. The next prime is 3921601. The reversal of 3921564 is 4651293.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (383670).

Almost surely, 2^3921564 is an apocalyptic number.

It is an amenable number.

3921564 is an abundant number, since it is smaller than the sum of its proper divisors (5286516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3921564 is a wasteful number, since it uses less digits than its factorization.

3921564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2067 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 3921564 is about 1980.2939175789. The cubic root of 3921564 is about 157.6956701368.

The spelling of 3921564 in words is "three million, nine hundred twenty-one thousand, five hundred sixty-four".