868143 has 4 divisors (see below), whose sum is σ = 1157528. Its totient is φ = 578760.

The previous prime is 868123. The next prime is 868151. The reversal of 868143 is 341868.

It is a happy number.

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

It is not a de Polignac number, because 868143 - 2⁵ = 868111 is a prime.

It is a D-number.

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 868143.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868143.

It is not an unprimeable number, because it can be changed into a prime (868103) 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, 144688 + ... + 144693.

It is an arithmetic number, because the mean of its divisors is an integer number (289382).

2⁸⁶⁸¹⁴³ is an apocalyptic number.

868143 is a deficient number, since it is larger than the sum of its proper divisors (289385).

868143 is a wasteful number, since it uses less digits than its factorization.

868143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289384.

The product of its digits is 4608, while the sum is 30.

The square root of 868143 is about 931.7419170564. The cubic root of 868143 is about 95.3960566034.

The spelling of 868143 in words is "eight hundred sixty-eight thousand, one hundred forty-three".