840875 has 24 divisors (see below), whose sum is σ = 1239264. Its totient is φ = 558000.

The previous prime is 840863. The next prime is 840907. The reversal of 840875 is 578048.

It is not a de Polignac number, because 840875 - 2⁴ = 840859 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 27110 + ... + 27140.

It is an arithmetic number, because the mean of its divisors is an integer number (51636).

2⁸⁴⁰⁸⁷⁵ is an apocalyptic number.

840875 is a deficient number, since it is larger than the sum of its proper divisors (398389).

840875 is an equidigital number, since it uses as much as digits as its factorization.

840875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 840875 is about 916.9923663804. The cubic root of 840875 is about 94.3866300010.

Multiplying 840875 by its product of nonzero digits (8960), we get a square (7534240000 = 86800²).

The spelling of 840875 in words is "eight hundred forty thousand, eight hundred seventy-five".