865151 has 4 divisors (see below), whose sum is σ = 988752. Its totient is φ = 741552.

The previous prime is 865121. The next prime is 865153. The reversal of 865151 is 151568.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 865151 - 2⁶ = 865087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61790 + ... + 61803.

It is an arithmetic number, because the mean of its divisors is an integer number (247188).

2⁸⁶⁵¹⁵¹ is an apocalyptic number.

865151 is a deficient number, since it is larger than the sum of its proper divisors (123601).

865151 is a wasteful number, since it uses less digits than its factorization.

865151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123600.

The product of its digits is 1200, while the sum is 26.

The square root of 865151 is about 930.1349364474. The cubic root of 865151 is about 95.2863383003.

The spelling of 865151 in words is "eight hundred sixty-five thousand, one hundred fifty-one".