4368221 has 12 divisors (see below), whose sum is σ = 5172636. Its totient is φ = 3664320.

The previous prime is 4368197. The next prime is 4368239. The reversal of 4368221 is 1228634.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 3705625 = 814^2 + 1925^2 .

It is not a de Polignac number, because 4368221 - 2¹⁸ = 4106077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4368251) 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, 185 + ... + 2961.

It is an arithmetic number, because the mean of its divisors is an integer number (431053).

Almost surely, 2^4368221 is an apocalyptic number.

It is an amenable number.

4368221 is a deficient number, since it is larger than the sum of its proper divisors (804415).

4368221 is a wasteful number, since it uses less digits than its factorization.

4368221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2801 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 4368221 is about 2090.0289471680. The cubic root of 4368221 is about 163.4687973325.

The spelling of 4368221 in words is "four million, three hundred sixty-eight thousand, two hundred twenty-one".