320420401 has 8 divisors (see below), whose sum is σ = 366842880. Its totient is φ = 274159968.

The previous prime is 320420363. The next prime is 320420413. The reversal of 320420401 is 104024023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320420401 - 2¹⁹ = 319896113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320420431) 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 7 ways as a sum of consecutive naturals, for example, 36241 + ... + 44206.

It is an arithmetic number, because the mean of its divisors is an integer number (45855360).

Almost surely, 2^320420401 is an apocalyptic number.

It is an amenable number.

320420401 is a deficient number, since it is larger than the sum of its proper divisors (46422479).

320420401 is an equidigital number, since it uses as much as digits as its factorization.

320420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81023.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 320420401 is about 17900.2905283685. The cubic root of 320420401 is about 684.2897790953.

Adding to 320420401 its reverse (104024023), we get a palindrome (424444424).

The spelling of 320420401 in words is "three hundred twenty million, four hundred twenty thousand, four hundred one".