320421242 has 4 divisors (see below), whose sum is σ = 480631866. Its totient is φ = 160210620.

The previous prime is 320421229. The next prime is 320421259. The reversal of 320421242 is 242124023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242124023 = 59 ⋅4103797.

It can be written as a sum of positive squares in only one way, i.e., 307967401 + 12453841 = 17549^2 + 3529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80105309 + ... + 80105312.

Almost surely, 2^320421242 is an apocalyptic number.

320421242 is a deficient number, since it is larger than the sum of its proper divisors (160210624).

320421242 is a wasteful number, since it uses less digits than its factorization.

320421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160210623.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 320421242 is about 17900.3140195919. The cubic root of 320421242 is about 684.2903777747.

Adding to 320421242 its reverse (242124023), we get a palindrome (562545265).

The spelling of 320421242 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred forty-two".