3603221 has 4 divisors (see below), whose sum is σ = 3727500. Its totient is φ = 3478944.

The previous prime is 3603169. The next prime is 3603227. The reversal of 3603221 is 1223063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223063 = 257 ⋅4759.

It can be written as a sum of positive squares in 2 ways, for example, as 2292196 + 1311025 = 1514^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 3603221 - 2¹⁰ = 3602197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3603221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3603227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62096 + ... + 62153.

It is an arithmetic number, because the mean of its divisors is an integer number (931875).

Almost surely, 2^3603221 is an apocalyptic number.

It is an amenable number.

3603221 is a deficient number, since it is larger than the sum of its proper divisors (124279).

3603221 is a wasteful number, since it uses less digits than its factorization.

3603221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124278.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3603221 is about 1898.2152143527. The cubic root of 3603221 is about 153.3075817918.

Adding to 3603221 its reverse (1223063), we get a palindrome (4826284).

The spelling of 3603221 in words is "three million, six hundred three thousand, two hundred twenty-one".