423221 has 2 divisors, whose sum is σ = 423222. Its totient is φ = 423220.

The previous prime is 423209. The next prime is 423229. The reversal of 423221 is 122324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 46225 = 614^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 423221 - 2¹⁴ = 406837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423196 and 423205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211610 + 211611.

It is an arithmetic number, because the mean of its divisors is an integer number (211611).

2⁴²³²²¹ is an apocalyptic number.

It is an amenable number.

423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

423221 is an equidigital number, since it uses as much as digits as its factorization.

423221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 14.

The square root of 423221 is about 650.5543789723. The cubic root of 423221 is about 75.0796782846.

Adding to 423221 its reverse (122324), we get a palindrome (545545).

The spelling of 423221 in words is "four hundred twenty-three thousand, two hundred twenty-one", and thus it is an iban number.