705851 has 4 divisors (see below), whose sum is σ = 709632. Its totient is φ = 702072.

The previous prime is 705841. The next prime is 705863. The reversal of 705851 is 158507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 705851 - 2⁶ = 705787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705851.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 705851.

It is not an unprimeable number, because it can be changed into a prime (705821) 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, 1595 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (177408).

2⁷⁰⁵⁸⁵¹ is an apocalyptic number.

705851 is a deficient number, since it is larger than the sum of its proper divisors (3781).

705851 is a wasteful number, since it uses less digits than its factorization.

705851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 705851 is about 840.1493914775. The cubic root of 705851 is about 89.0371010574.

The spelling of 705851 in words is "seven hundred five thousand, eight hundred fifty-one".