873842 has 6 divisors (see below), whose sum is σ = 1312749.
Its totient is φ = 436260.
The previous prime is 873787. The next prime is 873863. The reversal of 873842 is 248378.
Multipling 873842 by its sum of digits (32), we get a square (27962944 = 52882).
It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 83521 = 889^2 + 289^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=661.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 873799 and 873808.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 873842.
It is an unprimeable number.
873842 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 2 ways as a sum of consecutive naturals, for example, 992 + ... + 1652.
2873842 is an apocalyptic number.
873842 is a deficient number, since it is larger than the sum of its proper divisors (438907).
873842 is an frugal number, since it uses more digits than its factorization.
873842 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1324 (or 663 counting only the distinct ones).
The product of its digits is 10752, while the sum is 32.
The square root of 873842 is about 934.7951647286.
The cubic root of 873842 is about 95.6043467151.
The spelling of 873842 in words is "eight hundred seventy-three thousand, eight hundred forty-two".