442542111 has 16 divisors (see below), whose sum is σ = 658669440. Its totient is φ = 261969120.

The previous prime is 442542109. The next prime is 442542119. The reversal of 442542111 is 111245244.

It is not a de Polignac number, because 442542111 - 2¹ = 442542109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442542119) 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 in 15 ways as a sum of consecutive naturals, for example, 154516 + ... + 157353.

It is an arithmetic number, because the mean of its divisors is an integer number (41166840).

Almost surely, 2^442542111 is an apocalyptic number.

442542111 is a deficient number, since it is larger than the sum of its proper divisors (216127329).

442542111 is a wasteful number, since it uses less digits than its factorization.

442542111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311926.

The product of its digits is 1280, while the sum is 24.

The square root of 442542111 is about 21036.6848861697. The cubic root of 442542111 is about 762.0524571047.

Adding to 442542111 its reverse (111245244), we get a palindrome (553787355).

The spelling of 442542111 in words is "four hundred forty-two million, five hundred forty-two thousand, one hundred eleven".