111992 has 8 divisors (see below), whose sum is σ = 210000. Its totient is φ = 55992.

The previous prime is 111977. The next prime is 111997. The reversal of 111992 is 299111.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111997) by changing a digit.

111992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6992 + ... + 7007.

It is an arithmetic number, because the mean of its divisors is an integer number (26250).

2¹¹¹⁹⁹² is an apocalyptic number.

It is an amenable number.

111992 is a deficient number, since it is larger than the sum of its proper divisors (98008).

111992 is a wasteful number, since it uses less digits than its factorization.

111992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14005 (or 14001 counting only the distinct ones).

The product of its digits is 162, while the sum is 23.

The square root of 111992 is about 334.6520581141. The cubic root of 111992 is about 48.2016975694.

It can be divided in two parts, 11 and 1992, that multiplied together give a palindrome (21912).

The spelling of 111992 in words is "one hundred eleven thousand, nine hundred ninety-two".