865395 has 12 divisors (see below), whose sum is σ = 1500096. Its totient is φ = 461520.

The previous prime is 865379. The next prime is 865409. The reversal of 865395 is 593568.

It is not a de Polignac number, because 865395 - 2⁴ = 865379 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9571 + ... + 9660.

It is an arithmetic number, because the mean of its divisors is an integer number (125008).

2⁸⁶⁵³⁹⁵ is an apocalyptic number.

865395 is a deficient number, since it is larger than the sum of its proper divisors (634701).

865395 is a wasteful number, since it uses less digits than its factorization.

865395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19242 (or 19239 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 865395 is about 930.2660909654. The cubic root of 865395 is about 95.2952953807.

The spelling of 865395 in words is "eight hundred sixty-five thousand, three hundred ninety-five".