866095 has 4 divisors (see below), whose sum is σ = 1039320. Its totient is φ = 692872.

The previous prime is 866093. The next prime is 866101. The reversal of 866095 is 590668.

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 866095 - 2¹ = 866093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86605 + ... + 86614.

It is an arithmetic number, because the mean of its divisors is an integer number (259830).

2⁸⁶⁶⁰⁹⁵ is an apocalyptic number.

866095 is a deficient number, since it is larger than the sum of its proper divisors (173225).

866095 is a wasteful number, since it uses less digits than its factorization.

866095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173224.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 866095 is about 930.6422513512. The cubic root of 866095 is about 95.3209825829.

The spelling of 866095 in words is "eight hundred sixty-six thousand, ninety-five".