191112 has 16 divisors (see below), whose sum is σ = 477840. Its totient is φ = 63696.

The previous prime is 191099. The next prime is 191119. The reversal of 191112 is 211191.

It is a junction number, because it is equal to n+sod(n) for n = 191091 and 191100.

It is not an unprimeable number, because it can be changed into a prime (191119) by changing a digit.

191112 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 in 3 ways as a sum of consecutive naturals, for example, 3958 + ... + 4005.

It is an arithmetic number, because the mean of its divisors is an integer number (29865).

2¹⁹¹¹¹² is an apocalyptic number.

191112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191112 is an abundant number, since it is smaller than the sum of its proper divisors (286728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191112 is a wasteful number, since it uses less digits than its factorization.

191112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972 (or 7968 counting only the distinct ones).

The product of its digits is 18, while the sum is 15.

The square root of 191112 is about 437.1635849428. The cubic root of 191112 is about 57.6009066215.

It can be divided in two parts, 191 and 112, that added together give a palindrome (303).

The spelling of 191112 in words is "one hundred ninety-one thousand, one hundred twelve".