1135811 has 4 divisors (see below), whose sum is σ = 1139712. Its totient is φ = 1131912.

The previous prime is 1135777. The next prime is 1135819. The reversal of 1135811 is 1185311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1185311 = 331 ⋅3581.

It is a cyclic number.

It is not a de Polignac number, because 1135811 - 2¹⁰ = 1134787 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135819) 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, 1475 + ... + 2108.

It is an arithmetic number, because the mean of its divisors is an integer number (284928).

2^1135811 is an apocalyptic number.

1135811 is a deficient number, since it is larger than the sum of its proper divisors (3901).

1135811 is an equidigital number, since it uses as much as digits as its factorization.

1135811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900.

The product of its digits is 120, while the sum is 20.

The square root of 1135811 is about 1065.7443408248. The cubic root of 1135811 is about 104.3362820286.

The spelling of 1135811 in words is "one million, one hundred thirty-five thousand, eight hundred eleven".