442412111 has 4 divisors (see below), whose sum is σ = 443281800. Its totient is φ = 441542424.

The previous prime is 442412101. The next prime is 442412171. The reversal of 442412111 is 111214244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442412111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442412101) 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 in 3 ways as a sum of consecutive naturals, for example, 434081 + ... + 435098.

It is an arithmetic number, because the mean of its divisors is an integer number (110820450).

Almost surely, 2^442412111 is an apocalyptic number.

442412111 is a deficient number, since it is larger than the sum of its proper divisors (869689).

442412111 is an equidigital number, since it uses as much as digits as its factorization.

442412111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869688.

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

The square root of 442412111 is about 21033.5948187655. The cubic root of 442412111 is about 761.9778302921.

Adding to 442412111 its reverse (111214244), we get a palindrome (553626355).

The spelling of 442412111 in words is "four hundred forty-two million, four hundred twelve thousand, one hundred eleven".