1135809 has 32 divisors (see below), whose sum is σ = 1843200. Its totient is φ = 689040.

The previous prime is 1135777. The next prime is 1135819. The reversal of 1135809 is 9085311.

It is not a de Polignac number, because 1135809 - 2⁵ = 1135777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 19222 + ... + 19280.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2^1135809 is an apocalyptic number.

It is an amenable number.

1135809 is a deficient number, since it is larger than the sum of its proper divisors (707391).

1135809 is a wasteful number, since it uses less digits than its factorization.

1135809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1135809 is about 1065.7434025130. The cubic root of 1135809 is about 104.3362207881.

The spelling of 1135809 in words is "one million, one hundred thirty-five thousand, eight hundred nine".