3704221 has 12 divisors (see below), whose sum is σ = 4047744. Its totient is φ = 3385800.

The previous prime is 3704213. The next prime is 3704237. The reversal of 3704221 is 1224073.

3704221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3704221 - 2³ = 3704213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3704201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11026 + ... + 11356.

It is an arithmetic number, because the mean of its divisors is an integer number (337312).

Almost surely, 2^3704221 is an apocalyptic number.

3704221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3704221 is a deficient number, since it is larger than the sum of its proper divisors (343523).

3704221 is a wasteful number, since it uses less digits than its factorization.

3704221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 3704221 is about 1924.6352901264. The cubic root of 3704221 is about 154.7268306819.

Adding to 3704221 its reverse (1224073), we get a palindrome (4928294).

The spelling of 3704221 in words is "three million, seven hundred four thousand, two hundred twenty-one".