659221 has 2 divisors, whose sum is σ = 659222. Its totient is φ = 659220.

The previous prime is 659189. The next prime is 659231. The reversal of 659221 is 122956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562500 + 96721 = 750^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 659221 - 2⁵ = 659189 is a prime.

It is a d-powerful number, because it can be written as 6 + 5⁵ + 2¹⁷ + 9³ + 2¹⁹ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329610 + 329611.

It is an arithmetic number, because the mean of its divisors is an integer number (329611).

2⁶⁵⁹²²¹ is an apocalyptic number.

It is an amenable number.

659221 is a deficient number, since it is larger than the sum of its proper divisors (1).

659221 is an equidigital number, since it uses as much as digits as its factorization.

659221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 659221 is about 811.9242575512. The cubic root of 659221 is about 87.0316087198.

The spelling of 659221 in words is "six hundred fifty-nine thousand, two hundred twenty-one".