1191112 has 24 divisors (see below), whose sum is σ = 2421090. Its totient is φ = 549120.

The previous prime is 1191109. The next prime is 1191119. The reversal of 1191112 is 2111911.

It can be written as a sum of positive squares in 3 ways, for example, as 391876 + 799236 = 626^2 + 894^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 912 + ... + 1792.

2^1191112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1210545).

1191112 is an abundant number, since it is smaller than the sum of its proper divisors (1229978).

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

1191112 is a wasteful number, since it uses less digits than its factorization.

1191112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 896 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

The square root of 1191112 is about 1091.3807768144. The cubic root of 1191112 is about 106.0028479121.

The spelling of 1191112 in words is "one million, one hundred ninety-one thousand, one hundred twelve".