4544221 has 4 divisors (see below), whose sum is σ = 4957344. Its totient is φ = 4131100.

The previous prime is 4544209. The next prime is 4544233. The reversal of 4544221 is 1224454.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (4544209) and next prime (4544233).

It is a cyclic number.

It is not a de Polignac number, because 4544221 - 2⁷ = 4544093 is a prime.

It is an Ulam number.

It is a Duffinian number.

4544221 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 4544192 and 4544201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4544201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206545 + ... + 206566.

It is an arithmetic number, because the mean of its divisors is an integer number (1239336).

Almost surely, 2^4544221 is an apocalyptic number.

It is an amenable number.

4544221 is a deficient number, since it is larger than the sum of its proper divisors (413123).

4544221 is a wasteful number, since it uses less digits than its factorization.

4544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413122.

The product of its digits is 1280, while the sum is 22.

The square root of 4544221 is about 2131.7178518744. The cubic root of 4544221 is about 165.6353951468.

Adding to 4544221 its reverse (1224454), we get a palindrome (5768675).

The spelling of 4544221 in words is "four million, five hundred forty-four thousand, two hundred twenty-one".