321442249 has 2 divisors, whose sum is σ = 321442250. Its totient is φ = 321442248.

The previous prime is 321442229. The next prime is 321442291. The reversal of 321442249 is 942244123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311875600 + 9566649 = 17660^2 + 3093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321442249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321442249.

It is not a weakly prime, because it can be changed into another prime (321442229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160721124 + 160721125.

It is an arithmetic number, because the mean of its divisors is an integer number (160721125).

Almost surely, 2^321442249 is an apocalyptic number.

It is an amenable number.

321442249 is a deficient number, since it is larger than the sum of its proper divisors (1).

321442249 is an equidigital number, since it uses as much as digits as its factorization.

321442249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 321442249 is about 17928.8105852006. The cubic root of 321442249 is about 685.0164266933.

The spelling of 321442249 in words is "three hundred twenty-one million, four hundred forty-two thousand, two hundred forty-nine".