442021243042 has 4 divisors (see below), whose sum is σ = 663031864566. Its totient is φ = 221010621520.

The previous prime is 442021243039. The next prime is 442021243061. The reversal of 442021243042 is 240342120244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 229095292321 + 212925950721 = 478639^2 + 461439^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442021243042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505310759 + ... + 110505310762.

Almost surely, 2^442021243042 is an apocalyptic number.

442021243042 is a deficient number, since it is larger than the sum of its proper divisors (221010621524).

442021243042 is a wasteful number, since it uses less digits than its factorization.

442021243042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221010621523.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 442021243042 its reverse (240342120244), we get a palindrome (682363363286).

The spelling of 442021243042 in words is "four hundred forty-two billion, twenty-one million, two hundred forty-three thousand, forty-two".