1165589 has 4 divisors (see below), whose sum is σ = 1194060. Its totient is φ = 1137120.

The previous prime is 1165583. The next prime is 1165643. The reversal of 1165589 is 9855611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 970225 = 442^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165589 - 2¹² = 1161493 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 (1165583) 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, 14174 + ... + 14255.

It is an arithmetic number, because the mean of its divisors is an integer number (298515).

2^1165589 is an apocalyptic number.

It is an amenable number.

1165589 is a deficient number, since it is larger than the sum of its proper divisors (28471).

1165589 is an equidigital number, since it uses as much as digits as its factorization.

1165589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28470.

The product of its digits is 10800, while the sum is 35.

The square root of 1165589 is about 1079.6244717493. The cubic root of 1165589 is about 105.2402360221.

The spelling of 1165589 in words is "one million, one hundred sixty-five thousand, five hundred eighty-nine".