81112 has 8 divisors (see below), whose sum is σ = 152100. Its totient is φ = 40552.

The previous prime is 81101. The next prime is 81119. The reversal of 81112 is 21118.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 81092 and 81101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81119) by changing a digit.

81112 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, 5062 + ... + 5077.

2⁸¹¹¹² is an apocalyptic number.

It is an amenable number.

81112 is a deficient number, since it is larger than the sum of its proper divisors (70988).

81112 is a wasteful number, since it uses less digits than its factorization.

81112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10145 (or 10141 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 81112 is about 284.8016853883. The cubic root of 81112 is about 43.2874201411.

The spelling of 81112 in words is "eighty-one thousand, one hundred twelve".