4328221 has 4 divisors (see below), whose sum is σ = 4477500. Its totient is φ = 4178944.

The previous prime is 4328213. The next prime is 4328227. The reversal of 4328221 is 1228234.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 864900 = 1861^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4328221 - 2³ = 4328213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4328192 and 4328201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4328227) 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, 74596 + ... + 74653.

It is an arithmetic number, because the mean of its divisors is an integer number (1119375).

Almost surely, 2^4328221 is an apocalyptic number.

It is an amenable number.

4328221 is a deficient number, since it is larger than the sum of its proper divisors (149279).

4328221 is a wasteful number, since it uses less digits than its factorization.

4328221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149278.

The product of its digits is 768, while the sum is 22.

The square root of 4328221 is about 2080.4376943326. The cubic root of 4328221 is about 162.9683027680.

The spelling of 4328221 in words is "four million, three hundred twenty-eight thousand, two hundred twenty-one".