873565 has 16 divisors (see below), whose sum is σ = 1307520. Its totient is φ = 544320.

The previous prime is 873553. The next prime is 873569. The reversal of 873565 is 565378.

It is a happy number.

873565 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 873565 - 2⁷ = 873437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 873565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873569) 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 15 ways as a sum of consecutive naturals, for example, 750 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (81720).

2⁸⁷³⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

873565 is a deficient number, since it is larger than the sum of its proper divisors (433955).

873565 is a wasteful number, since it uses less digits than its factorization.

873565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its digits is 25200, while the sum is 34.

The square root of 873565 is about 934.6469921847. The cubic root of 873565 is about 95.5942437434.

The spelling of 873565 in words is "eight hundred seventy-three thousand, five hundred sixty-five".