8446221 has 64 divisors (see below), whose sum is σ = 15667200. Its totient is φ = 4390848.

The previous prime is 8446201. The next prime is 8446223. The reversal of 8446221 is 1226448.

It is not a de Polignac number, because 8446221 - 2¹⁷ = 8315149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8446223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126030 + ... + 126096.

It is an arithmetic number, because the mean of its divisors is an integer number (244800).

Almost surely, 2^8446221 is an apocalyptic number.

It is an amenable number.

8446221 is a deficient number, since it is larger than the sum of its proper divisors (7220979).

8446221 is a wasteful number, since it uses less digits than its factorization.

8446221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 8446221 is about 2906.2382902990. The cubic root of 8446221 is about 203.6514376439.

The spelling of 8446221 in words is "eight million, four hundred forty-six thousand, two hundred twenty-one".