3604221 has 12 divisors (see below), whose sum is σ = 5512572. Its totient is φ = 2261376.

The previous prime is 3604213. The next prime is 3604241. The reversal of 3604221 is 1224063.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 2576025 = 1014^2 + 1605^2 .

It is not a de Polignac number, because 3604221 - 2³ = 3604213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3604194 and 3604203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3604241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11626 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (459381).

Almost surely, 2^3604221 is an apocalyptic number.

It is an amenable number.

3604221 is a deficient number, since it is larger than the sum of its proper divisors (1908351).

3604221 is a wasteful number, since it uses less digits than its factorization.

3604221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23580 (or 23577 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3604221 is about 1898.4786014069. The cubic root of 3604221 is about 153.3217629371.

Adding to 3604221 its reverse (1224063), we get a palindrome (4828284).

It can be divided in two parts, 36042 and 21, that added together give a palindrome (36063).

The spelling of 3604221 in words is "three million, six hundred four thousand, two hundred twenty-one".