8459221 has 4 divisors (see below), whose sum is σ = 8467200. Its totient is φ = 8451244.

The previous prime is 8459197. The next prime is 8459233. The reversal of 8459221 is 1229548.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8459221 - 2⁵ = 8459189 is a prime.

It is a Duffinian number.

8459221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8459281) 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, 2101 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^8459221 is an apocalyptic number.

It is an amenable number.

8459221 is a deficient number, since it is larger than the sum of its proper divisors (7979).

8459221 is a wasteful number, since it uses less digits than its factorization.

8459221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978.

The product of its digits is 5760, while the sum is 31.

The square root of 8459221 is about 2908.4739985085. The cubic root of 8459221 is about 203.7558674462.

The spelling of 8459221 in words is "eight million, four hundred fifty-nine thousand, two hundred twenty-one".