1091135 has 4 divisors (see below), whose sum is σ = 1309368. Its totient is φ = 872904.

The previous prime is 1091119. The next prime is 1091137. The reversal of 1091135 is 5311901.

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 1091135 - 2⁴ = 1091119 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 (1091137) 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, 109109 + ... + 109118.

It is an arithmetic number, because the mean of its divisors is an integer number (327342).

2^1091135 is an apocalyptic number.

1091135 is a deficient number, since it is larger than the sum of its proper divisors (218233).

1091135 is an equidigital number, since it uses as much as digits as its factorization.

1091135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218232.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1091135 is about 1044.5740758797. The cubic root of 1091135 is about 102.9499552657.

The spelling of 1091135 in words is "one million, ninety-one thousand, one hundred thirty-five".