3921204 has 24 divisors (see below), whose sum is σ = 10456768. Its totient is φ = 1120320.

The previous prime is 3921193. The next prime is 3921209. The reversal of 3921204 is 4021293.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921209) 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 7 ways as a sum of consecutive naturals, for example, 23257 + ... + 23424.

Almost surely, 2^3921204 is an apocalyptic number.

It is an amenable number.

3921204 is an abundant number, since it is smaller than the sum of its proper divisors (6535564).

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

3921204 is a wasteful number, since it uses less digits than its factorization.

3921204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46695 (or 46693 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 3921204 is about 1980.2030198947. The cubic root of 3921204 is about 157.6908444959.

Adding to 3921204 its reverse (4021293), we get a palindrome (7942497).

It can be divided in two parts, 392 and 1204, that added together give a triangular number (1596 = T₅₆).

The spelling of 3921204 in words is "three million, nine hundred twenty-one thousand, two hundred four".