4657221 has 6 divisors (see below), whose sum is σ = 6727110. Its totient is φ = 3104808.

The previous prime is 4657199. The next prime is 4657229. The reversal of 4657221 is 1227564.

4657221 is a `hidden beast` number, since 4 + 657 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 1028196 = 1905^2 + 1014^2 .

It is not a de Polignac number, because 4657221 - 2⁵ = 4657189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4657229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258726 + ... + 258743.

It is an arithmetic number, because the mean of its divisors is an integer number (1121185).

Almost surely, 2^4657221 is an apocalyptic number.

It is an amenable number.

4657221 is a deficient number, since it is larger than the sum of its proper divisors (2069889).

4657221 is a wasteful number, since it uses less digits than its factorization.

4657221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517475 (or 517472 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 4657221 is about 2158.0595450543. The cubic root of 4657221 is about 166.9971075311.

The spelling of 4657221 in words is "four million, six hundred fifty-seven thousand, two hundred twenty-one".