858842 has 8 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 426844.

The previous prime is 858841. The next prime is 858859. The reversal of 858842 is 248858.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (858841) 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 3 ways as a sum of consecutive naturals, for example, 842 + ... + 1557.

It is an arithmetic number, because the mean of its divisors is an integer number (162000).

2⁸⁵⁸⁸⁴² is an apocalyptic number.

858842 is a deficient number, since it is larger than the sum of its proper divisors (437158).

858842 is a wasteful number, since it uses less digits than its factorization.

858842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580.

The product of its digits is 20480, while the sum is 35.

The square root of 858842 is about 926.7372874769. The cubic root of 858842 is about 95.0541519519.

The spelling of 858842 in words is "eight hundred fifty-eight thousand, eight hundred forty-two".