4512221 has 8 divisors (see below), whose sum is σ = 5174400. Its totient is φ = 3854448.

The previous prime is 4512217. The next prime is 4512223. The reversal of 4512221 is 1222154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4512221 - 2² = 4512217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4512221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4512223) 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 7 ways as a sum of consecutive naturals, for example, 1520 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (646800).

Almost surely, 2^4512221 is an apocalyptic number.

It is an amenable number.

4512221 is a deficient number, since it is larger than the sum of its proper divisors (662179).

4512221 is a wasteful number, since it uses less digits than its factorization.

4512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203.

The product of its digits is 160, while the sum is 17.

The square root of 4512221 is about 2124.1989078238. The cubic root of 4512221 is about 165.2456823637.

Adding to 4512221 its reverse (1222154), we get a palindrome (5734375).

It can be divided in two parts, 45 and 12221, that multiplied together give a palindrome (549945).

The spelling of 4512221 in words is "four million, five hundred twelve thousand, two hundred twenty-one".