705785 has 4 divisors (see below), whose sum is σ = 846948. Its totient is φ = 564624.

The previous prime is 705781. The next prime is 705787. The reversal of 705785 is 587507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587507 = 149 ⋅3943.

It can be written as a sum of positive squares in 2 ways, for example, as 322624 + 383161 = 568^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 705785 - 2² = 705781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705781) 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, 70574 + ... + 70583.

It is an arithmetic number, because the mean of its divisors is an integer number (211737).

2⁷⁰⁵⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

705785 is a deficient number, since it is larger than the sum of its proper divisors (141163).

705785 is a wasteful number, since it uses less digits than its factorization.

705785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141162.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 705785 is about 840.1101118306. The cubic root of 705785 is about 89.0343258580.

The spelling of 705785 in words is "seven hundred five thousand, seven hundred eighty-five".