842000111 has 4 divisors (see below), whose sum is σ = 843729552. Its totient is φ = 840270672.

The previous prime is 842000101. The next prime is 842000119. The reversal of 842000111 is 111000248.

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-842000111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 842000111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842000119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863990 + ... + 864963.

It is an arithmetic number, because the mean of its divisors is an integer number (210932388).

Almost surely, 2^842000111 is an apocalyptic number.

842000111 is a deficient number, since it is larger than the sum of its proper divisors (1729441).

842000111 is a wasteful number, since it uses less digits than its factorization.

842000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729440.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 842000111 is about 29017.2381697501. The cubic root of 842000111 is about 944.2870843396.

Adding to 842000111 its reverse (111000248), we get a palindrome (953000359).

The spelling of 842000111 in words is "eight hundred forty-two million, one hundred eleven", and thus it is an aban number.