605221 has 2 divisors, whose sum is σ = 605222. Its totient is φ = 605220.

The previous prime is 605191. The next prime is 605233. The reversal of 605221 is 122506.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 12321 = 770^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 605221 - 2¹¹ = 603173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 605195 and 605204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302610 + 302611.

It is an arithmetic number, because the mean of its divisors is an integer number (302611).

2⁶⁰⁵²²¹ is an apocalyptic number.

It is an amenable number.

605221 is a deficient number, since it is larger than the sum of its proper divisors (1).

605221 is an equidigital number, since it uses as much as digits as its factorization.

605221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 605221 is about 777.9595105145. The cubic root of 605221 is about 84.5872026724.

Adding to 605221 its reverse (122506), we get a palindrome (727727).

The spelling of 605221 in words is "six hundred five thousand, two hundred twenty-one".