320421250 has 20 divisors (see below), whose sum is σ = 600599934. Its totient is φ = 128168000.

The previous prime is 320421229. The next prime is 320421259. The reversal of 320421250 is 52124023.

It can be written as a sum of positive squares in 5 ways, for example, as 9357481 + 311063769 = 3059^2 + 17637^2 .

It is not an unprimeable number, because it can be changed into a prime (320421259) 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 in 9 ways as a sum of consecutive naturals, for example, 126919 + ... + 129418.

Almost surely, 2^320421250 is an apocalyptic number.

320421250 is a deficient number, since it is larger than the sum of its proper divisors (280178684).

320421250 is an equidigital number, since it uses as much as digits as its factorization.

320421250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256359 (or 256344 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 320421250 is about 17900.3142430517. The cubic root of 320421250 is about 684.2903834696.

Adding to 320421250 its reverse (52124023), we get a palindrome (372545273).

The spelling of 320421250 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred fifty".