860855 has 4 divisors (see below), whose sum is σ = 1033032. Its totient is φ = 688680.

The previous prime is 860843. The next prime is 860861. The reversal of 860855 is 558068.

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

It is not a de Polignac number, because 860855 - 2⁶ = 860791 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86081 + ... + 86090.

It is an arithmetic number, because the mean of its divisors is an integer number (258258).

2⁸⁶⁰⁸⁵⁵ is an apocalyptic number.

860855 is a deficient number, since it is larger than the sum of its proper divisors (172177).

860855 is a wasteful number, since it uses less digits than its factorization.

860855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172176.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 860855 is about 927.8227201357. The cubic root of 860855 is about 95.1283583477.

The spelling of 860855 in words is "eight hundred sixty thousand, eight hundred fifty-five".