845705 has 16 divisors (see below), whose sum is σ = 1179264. Its totient is φ = 570240.

The previous prime is 845683. The next prime is 845717. The reversal of 845705 is 507548.

It is a de Polignac number, because none of the positive numbers 2^k-845705 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 2390 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (73704).

2⁸⁴⁵⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

845705 is a deficient number, since it is larger than the sum of its proper divisors (333559).

845705 is a wasteful number, since it uses less digits than its factorization.

845705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 845705 is about 919.6222050386. The cubic root of 845705 is about 94.5670045406.

The spelling of 845705 in words is "eight hundred forty-five thousand, seven hundred five".