321253249 has 2 divisors, whose sum is σ = 321253250. Its totient is φ = 321253248.

The previous prime is 321253223. The next prime is 321253253. The reversal of 321253249 is 942352123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299463025 + 21790224 = 17305^2 + 4668^2 .

It is a cyclic number.

It is not a de Polignac number, because 321253249 - 2¹¹ = 321251201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321253249.

It is not a weakly prime, because it can be changed into another prime (321254249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160626624 + 160626625.

It is an arithmetic number, because the mean of its divisors is an integer number (160626625).

Almost surely, 2^321253249 is an apocalyptic number.

It is an amenable number.

321253249 is a deficient number, since it is larger than the sum of its proper divisors (1).

321253249 is an equidigital number, since it uses as much as digits as its factorization.

321253249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 321253249 is about 17923.5389641666. The cubic root of 321253249 is about 684.8821428647.

The spelling of 321253249 in words is "three hundred twenty-one million, two hundred fifty-three thousand, two hundred forty-nine".