855842 has 8 divisors (see below), whose sum is σ = 1382556. Its totient is φ = 394992.

The previous prime is 855821. The next prime is 855851. The reversal of 855842 is 248558.

It can be written as a sum of positive squares in 2 ways, for example, as 829921 + 25921 = 911^2 + 161^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 855799 and 855808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16433 + ... + 16484.

2⁸⁵⁵⁸⁴² is an apocalyptic number.

855842 is a deficient number, since it is larger than the sum of its proper divisors (526714).

855842 is a wasteful number, since it uses less digits than its factorization.

855842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32932.

The product of its digits is 12800, while the sum is 32.

The square root of 855842 is about 925.1172898611. The cubic root of 855842 is about 94.9433457217.

The spelling of 855842 in words is "eight hundred fifty-five thousand, eight hundred forty-two".