320421245 has 16 divisors (see below), whose sum is σ = 388402560. Its totient is φ = 253752000.

The previous prime is 320421229. The next prime is 320421259. The reversal of 320421245 is 542124023.

It is a happy number.

It is not a de Polignac number, because 320421245 - 2⁴ = 320421229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320421245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293150 + ... + 294240.

It is an arithmetic number, because the mean of its divisors is an integer number (24275160).

Almost surely, 2^320421245 is an apocalyptic number.

It is an amenable number.

320421245 is a deficient number, since it is larger than the sum of its proper divisors (67981315).

320421245 is a wasteful number, since it uses less digits than its factorization.

320421245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 320421245 is about 17900.3141033894. The cubic root of 320421245 is about 684.2903799102.

Adding to 320421245 its reverse (542124023), we get a palindrome (862545268).

The spelling of 320421245 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred forty-five".