322921 has 2 divisors, whose sum is σ = 322922. Its totient is φ = 322920.

The previous prime is 322919. The next prime is 322939. The reversal of 322921 is 129223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290521 + 32400 = 539^2 + 180^2 .

It is an emirp because it is prime and its reverse (129223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322921 - 2¹ = 322919 is a prime.

Together with 322919, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (322901) 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, 161460 + 161461.

It is an arithmetic number, because the mean of its divisors is an integer number (161461).

2³²²⁹²¹ is an apocalyptic number.

It is an amenable number.

322921 is a deficient number, since it is larger than the sum of its proper divisors (1).

322921 is an equidigital number, since it uses as much as digits as its factorization.

322921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 322921 is about 568.2613835199. The cubic root of 322921 is about 68.6065261381.

The spelling of 322921 in words is "three hundred twenty-two thousand, nine hundred twenty-one".