865135 has 8 divisors (see below), whose sum is σ = 1053216. Its totient is φ = 682080.

The previous prime is 865121. The next prime is 865153. The reversal of 865135 is 531568.

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

It is not a de Polignac number, because 865135 - 2⁵ = 865103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 864 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (131652).

2⁸⁶⁵¹³⁵ is an apocalyptic number.

865135 is a deficient number, since it is larger than the sum of its proper divisors (188081).

865135 is a wasteful number, since it uses less digits than its factorization.

865135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513.

The product of its digits is 3600, while the sum is 28.

The square root of 865135 is about 930.1263355050. The cubic root of 865135 is about 95.2857508919.

It can be divided in two parts, 865 and 135, that added together give a cube (1000 = 10³).

The spelling of 865135 in words is "eight hundred sixty-five thousand, one hundred thirty-five".