4505221 has 16 divisors (see below), whose sum is σ = 5512320. Its totient is φ = 3606720.

The previous prime is 4505213. The next prime is 4505227. The reversal of 4505221 is 1225054.

It is not a de Polignac number, because 4505221 - 2³ = 4505213 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4505227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34326 + ... + 34456.

It is an arithmetic number, because the mean of its divisors is an integer number (344520).

Almost surely, 2^4505221 is an apocalyptic number.

It is an amenable number.

4505221 is a deficient number, since it is larger than the sum of its proper divisors (1007099).

4505221 is an equidigital number, since it uses as much as digits as its factorization.

4505221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4505221 is about 2122.5505883253. The cubic root of 4505221 is about 165.1601872569.

It can be divided in two parts, 450 and 5221, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 4505221 in words is "four million, five hundred five thousand, two hundred twenty-one".