865995 has 16 divisors (see below), whose sum is σ = 1492512. Its totient is φ = 426240.

The previous prime is 865993. The next prime is 866003. The reversal of 865995 is 599568.

865995 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 865995 - 2¹ = 865993 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865995.

It is not an unprimeable number, because it can be changed into a prime (865993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2026 + ... + 2415.

It is an arithmetic number, because the mean of its divisors is an integer number (93282).

2⁸⁶⁵⁹⁹⁵ is an apocalyptic number.

865995 is a deficient number, since it is larger than the sum of its proper divisors (626517).

865995 is a wasteful number, since it uses less digits than its factorization.

865995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462.

The product of its digits is 97200, while the sum is 42.

The square root of 865995 is about 930.5885234624. The cubic root of 865995 is about 95.3173138301.

The spelling of 865995 in words is "eight hundred sixty-five thousand, nine hundred ninety-five".