1112191 has 4 divisors (see below), whose sum is σ = 1177632. Its totient is φ = 1046752.

The previous prime is 1112171. The next prime is 1112197. The reversal of 1112191 is 1912111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1912111 = 31 ⋅61681.

It is a cyclic number.

It is not a de Polignac number, because 1112191 - 2⁵ = 1112159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32695 + ... + 32728.

It is an arithmetic number, because the mean of its divisors is an integer number (294408).

2^1112191 is an apocalyptic number.

1112191 is a deficient number, since it is larger than the sum of its proper divisors (65441).

1112191 is an equidigital number, since it uses as much as digits as its factorization.

1112191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65440.

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

The square root of 1112191 is about 1054.6046652656. The cubic root of 1112191 is about 103.6079606590.

The spelling of 1112191 in words is "one million, one hundred twelve thousand, one hundred ninety-one".