605705 has 12 divisors (see below), whose sum is σ = 763140. Its totient is φ = 461472.

The previous prime is 605687. The next prime is 605707. The reversal of 605705 is 507506.

It can be written as a sum of positive squares in 2 ways, for example, as 414736 + 190969 = 644^2 + 437^2 .

It is not a de Polignac number, because 605705 - 2⁶ = 605641 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2531 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (63595).

2⁶⁰⁵⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

605705 is a deficient number, since it is larger than the sum of its proper divisors (157435).

605705 is a wasteful number, since it uses less digits than its factorization.

605705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 605705 is about 778.2705185217. The cubic root of 605705 is about 84.6097450151.

605705 divided by its sum of digits (23) gives a triangular number (26335 = T₂₂₉).

The spelling of 605705 in words is "six hundred five thousand, seven hundred five".