4393221 has 8 divisors (see below), whose sum is σ = 6694464. Its totient is φ = 2510400.

The previous prime is 4393219. The next prime is 4393229. The reversal of 4393221 is 1223934.

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

It is not a de Polignac number, because 4393221 - 2¹ = 4393219 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4393191 and 4393200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4393229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104580 + ... + 104621.

It is an arithmetic number, because the mean of its divisors is an integer number (836808).

Almost surely, 2^4393221 is an apocalyptic number.

It is an amenable number.

4393221 is a deficient number, since it is larger than the sum of its proper divisors (2301243).

4393221 is a wasteful number, since it uses less digits than its factorization.

4393221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209211.

The product of its digits is 1296, while the sum is 24.

The square root of 4393221 is about 2096.0011927478. The cubic root of 4393221 is about 163.7800566391.

The spelling of 4393221 in words is "four million, three hundred ninety-three thousand, two hundred twenty-one".