4381221 has 8 divisors (see below), whose sum is σ = 6291040. Its totient is φ = 2696112.

The previous prime is 4381187. The next prime is 4381249. The reversal of 4381221 is 1221834.

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

It is not a de Polignac number, because 4381221 - 2⁷ = 4381093 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 (4381271) 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, 56131 + ... + 56208.

It is an arithmetic number, because the mean of its divisors is an integer number (786380).

Almost surely, 2^4381221 is an apocalyptic number.

It is an amenable number.

4381221 is a deficient number, since it is larger than the sum of its proper divisors (1909819).

4381221 is a wasteful number, since it uses less digits than its factorization.

4381221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112355.

The product of its digits is 384, while the sum is 21.

The square root of 4381221 is about 2093.1366415024. The cubic root of 4381221 is about 163.6307999511.

The spelling of 4381221 in words is "four million, three hundred eighty-one thousand, two hundred twenty-one".