321043042 has 4 divisors (see below), whose sum is σ = 481564566. Its totient is φ = 160521520.

The previous prime is 321042983. The next prime is 321043049. The reversal of 321043042 is 240340123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240340123 = 37 ⋅6495679.

It can be written as a sum of positive squares in only one way, i.e., 320803921 + 239121 = 17911^2 + 489^2 .

It is a super-2 number, since 2×321043042² = 206137269633227528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321043049) 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 as a sum of consecutive naturals, namely, 80260759 + ... + 80260762.

Almost surely, 2^321043042 is an apocalyptic number.

321043042 is a deficient number, since it is larger than the sum of its proper divisors (160521524).

321043042 is a wasteful number, since it uses less digits than its factorization.

321043042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160521523.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 321043042 is about 17917.6740119916. The cubic root of 321043042 is about 684.7327296595.

Adding to 321043042 its reverse (240340123), we get a palindrome (561383165).

The spelling of 321043042 in words is "three hundred twenty-one million, forty-three thousand, forty-two".