320421259 has 2 divisors, whose sum is σ = 320421260. Its totient is φ = 320421258.

The previous prime is 320421229. The next prime is 320421307. The reversal of 320421259 is 952124023.

It is a weak prime.

It is an emirp because it is prime and its reverse (952124023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320421259 - 2¹⁹ = 319896971 is a prime.

It is not a weakly prime, because it can be changed into another prime (320421229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160210629 + 160210630.

It is an arithmetic number, because the mean of its divisors is an integer number (160210630).

Almost surely, 2^320421259 is an apocalyptic number.

320421259 is a deficient number, since it is larger than the sum of its proper divisors (1).

320421259 is an equidigital number, since it uses as much as digits as its factorization.

320421259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 320421259 is about 17900.3144944439. The cubic root of 320421259 is about 684.2903898764.

The spelling of 320421259 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred fifty-nine".