4398221 has 4 divisors (see below), whose sum is σ = 4589472. Its totient is φ = 4206972.

The previous prime is 4398217. The next prime is 4398239. The reversal of 4398221 is 1228934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4398221 - 2² = 4398217 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 (4398211) 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, 95591 + ... + 95636.

It is an arithmetic number, because the mean of its divisors is an integer number (1147368).

Almost surely, 2^4398221 is an apocalyptic number.

It is an amenable number.

4398221 is a deficient number, since it is larger than the sum of its proper divisors (191251).

4398221 is a wasteful number, since it uses less digits than its factorization.

4398221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191250.

The product of its digits is 3456, while the sum is 29.

The square root of 4398221 is about 2097.1936009820. The cubic root of 4398221 is about 163.8421667107.

The spelling of 4398221 in words is "four million, three hundred ninety-eight thousand, two hundred twenty-one".