865116 has 36 divisors (see below), whose sum is σ = 2499952. Its totient is φ = 247104.

The previous prime is 865103. The next prime is 865121. The reversal of 865116 is 611568.

865116 is a `hidden beast` number, since 8 + 651 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 865116.

It is a congruent number.

It is an unprimeable number.

865116 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1465 + ... + 1968.

2⁸⁶⁵¹¹⁶ is an apocalyptic number.

It is an amenable number.

865116 is an abundant number, since it is smaller than the sum of its proper divisors (1634836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865116 is a wasteful number, since it uses less digits than its factorization.

865116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450 (or 3445 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 865116 is about 930.1161217827. The cubic root of 865116 is about 95.2850533351.

The spelling of 865116 in words is "eight hundred sixty-five thousand, one hundred sixteen".