320420142 has 48 divisors (see below), whose sum is σ = 835186560. Its totient is φ = 86729616.

The previous prime is 320420119. The next prime is 320420143. The reversal of 320420142 is 241024023.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320420143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64528 + ... + 69315.

It is an arithmetic number, because the mean of its divisors is an integer number (17399720).

Almost surely, 2^320420142 is an apocalyptic number.

320420142 is an abundant number, since it is smaller than the sum of its proper divisors (514766418).

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

320420142 is a wasteful number, since it uses less digits than its factorization.

320420142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133877 (or 133874 counting only the distinct ones).

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

The square root of 320420142 is about 17900.2832938476. The cubic root of 320420142 is about 684.2895947218.

Adding to 320420142 its reverse (241024023), we get a palindrome (561444165).

The spelling of 320420142 in words is "three hundred twenty million, four hundred twenty thousand, one hundred forty-two".