865361 has 8 divisors (see below), whose sum is σ = 995904. Its totient is φ = 736560.

The previous prime is 865357. The next prime is 865363. The reversal of 865361 is 163568.

865361 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865361 - 2² = 865357 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (865363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2⁸⁶⁵³⁶¹ is an apocalyptic number.

It is an amenable number.

865361 is a deficient number, since it is larger than the sum of its proper divisors (130543).

865361 is a wasteful number, since it uses less digits than its factorization.

865361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871.

The product of its digits is 4320, while the sum is 29.

The square root of 865361 is about 930.2478164446. The cubic root of 865361 is about 95.2940473639.

The spelling of 865361 in words is "eight hundred sixty-five thousand, three hundred sixty-one".