4685221 has 2 divisors, whose sum is σ = 4685222. Its totient is φ = 4685220.

The previous prime is 4685207. The next prime is 4685231. The reversal of 4685221 is 1225864.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4468996 + 216225 = 2114^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 4685221 - 2⁵ = 4685189 is a prime.

It is a Chen prime.

4685221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4685221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4685201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2342610 + 2342611.

It is an arithmetic number, because the mean of its divisors is an integer number (2342611).

Almost surely, 2^4685221 is an apocalyptic number.

It is an amenable number.

4685221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4685221 is an equidigital number, since it uses as much as digits as its factorization.

4685221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 4685221 is about 2164.5371329686. The cubic root of 4685221 is about 167.3311106760.

The spelling of 4685221 in words is "four million, six hundred eighty-five thousand, two hundred twenty-one".