858955 has 8 divisors (see below), whose sum is σ = 1058832. Its totient is φ = 668448.

The previous prime is 858953. The next prime is 858961. The reversal of 858955 is 559858.

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 858955 - 2¹ = 858953 is a prime.

It is a Duffinian number.

858955 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (858953) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2137 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (132354).

2⁸⁵⁸⁹⁵⁵ is an apocalyptic number.

858955 is a deficient number, since it is larger than the sum of its proper divisors (199877).

858955 is a wasteful number, since it uses less digits than its factorization.

858955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685.

The product of its digits is 72000, while the sum is 40.

The square root of 858955 is about 926.7982520484. The cubic root of 858955 is about 95.0583206069.

The spelling of 858955 in words is "eight hundred fifty-eight thousand, nine hundred fifty-five".