442142111 has 2 divisors, whose sum is σ = 442142112. Its totient is φ = 442142110.

The previous prime is 442142081. The next prime is 442142117. The reversal of 442142111 is 111241244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442142111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442142117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221071055 + 221071056.

It is an arithmetic number, because the mean of its divisors is an integer number (221071056).

Almost surely, 2^442142111 is an apocalyptic number.

442142111 is a deficient number, since it is larger than the sum of its proper divisors (1).

442142111 is an equidigital number, since it uses as much as digits as its factorization.

442142111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 20.

The square root of 442142111 is about 21027.1755354826. The cubic root of 442142111 is about 761.8227894183.

Adding to 442142111 its reverse (111241244), we get a palindrome (553383355).

The spelling of 442142111 in words is "four hundred forty-two million, one hundred forty-two thousand, one hundred eleven".