4628221 has 12 divisors (see below), whose sum is σ = 5218108. Its totient is φ = 4080384.

The previous prime is 4628209. The next prime is 4628227. The reversal of 4628221 is 1228264.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 3556996 = 1035^2 + 1886^2 .

It is not a de Polignac number, because 4628221 - 2⁷ = 4628093 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4628227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6541 + ... + 7213.

Almost surely, 2^4628221 is an apocalyptic number.

It is an amenable number.

4628221 is a deficient number, since it is larger than the sum of its proper divisors (589887).

4628221 is a wasteful number, since it uses less digits than its factorization.

4628221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 709 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 4628221 is about 2151.3300537110. The cubic root of 4628221 is about 166.6497613964.

The spelling of 4628221 in words is "four million, six hundred twenty-eight thousand, two hundred twenty-one".