1117091 has 4 divisors (see below), whose sum is σ = 1133832. Its totient is φ = 1100352.

The previous prime is 1117079. The next prime is 1117099. The reversal of 1117091 is 1907111.

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 1117091 - 2⁶ = 1117027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8270 + ... + 8403.

It is an arithmetic number, because the mean of its divisors is an integer number (283458).

2^1117091 is an apocalyptic number.

1117091 is a deficient number, since it is larger than the sum of its proper divisors (16741).

1117091 is an equidigital number, since it uses as much as digits as its factorization.

1117091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16740.

The product of its (nonzero) digits is 63, while the sum is 20.

The square root of 1117091 is about 1056.9252575277. The cubic root of 1117091 is about 103.7598935744.

Adding to 1117091 its sum of digits (20), we get a palindrome (1117111).

The spelling of 1117091 in words is "one million, one hundred seventeen thousand, ninety-one".