4309221 has 8 divisors (see below), whose sum is σ = 6566464. Its totient is φ = 2462400.

The previous prime is 4309199. The next prime is 4309243. The reversal of 4309221 is 1229034.

It is an interprime number because it is at equal distance from previous prime (4309199) and next prime (4309243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4309221 - 2⁵ = 4309189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 205201 = 4309221 / (4 + 3 + 0 + 9 + 2 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

4309221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4309121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102580 + ... + 102621.

It is an arithmetic number, because the mean of its divisors is an integer number (820808).

Almost surely, 2^4309221 is an apocalyptic number.

It is an amenable number.

4309221 is a deficient number, since it is larger than the sum of its proper divisors (2257243).

4309221 is a wasteful number, since it uses less digits than its factorization.

4309221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205211.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 4309221 is about 2075.8663251761. The cubic root of 4309221 is about 162.7294871988.

The spelling of 4309221 in words is "four million, three hundred nine thousand, two hundred twenty-one".