1116991 has 4 divisors (see below), whose sum is σ = 1175800. Its totient is φ = 1058184.

The previous prime is 1116989. The next prime is 1117009. The reversal of 1116991 is 1996111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1116991 - 2¹ = 1116989 is a prime.

It is a Duffinian number.

1116991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29376 + ... + 29413.

It is an arithmetic number, because the mean of its divisors is an integer number (293950).

2^1116991 is an apocalyptic number.

1116991 is a deficient number, since it is larger than the sum of its proper divisors (58809).

1116991 is an equidigital number, since it uses as much as digits as its factorization.

1116991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58808.

The product of its digits is 486, while the sum is 28.

The square root of 1116991 is about 1056.8779494341. The cubic root of 1116991 is about 103.7567973482.

The spelling of 1116991 in words is "one million, one hundred sixteen thousand, nine hundred ninety-one".