320421042 has 32 divisors (see below), whose sum is σ = 716002560. Its totient is φ = 106213680.

The previous prime is 320421041. The next prime is 320421089. The reversal of 320421042 is 240124023.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (320421041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6618 + ... + 26165.

It is an arithmetic number, because the mean of its divisors is an integer number (22375080).

Almost surely, 2^320421042 is an apocalyptic number.

320421042 is an abundant number, since it is smaller than the sum of its proper divisors (395581518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320421042 is a wasteful number, since it uses less digits than its factorization.

320421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32975 (or 32969 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 320421042 is about 17900.3084330969. The cubic root of 320421042 is about 684.2902354015.

Adding to 320421042 its reverse (240124023), we get a palindrome (560545065).

The spelling of 320421042 in words is "three hundred twenty million, four hundred twenty-one thousand, forty-two".