259705 has 4 divisors (see below), whose sum is σ = 311652. Its totient is φ = 207760.

The previous prime is 259697. The next prime is 259717. The reversal of 259705 is 507952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41616 + 218089 = 204^2 + 467^2 .

It is not a de Polignac number, because 259705 - 2³ = 259697 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25966 + ... + 25975.

It is an arithmetic number, because the mean of its divisors is an integer number (77913).

2²⁵⁹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

259705 is a deficient number, since it is larger than the sum of its proper divisors (51947).

259705 is an equidigital number, since it uses as much as digits as its factorization.

259705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51946.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 259705 is about 509.6125979605. The cubic root of 259705 is about 63.8008948948.

It can be divided in two parts, 25 and 9705, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 259705 in words is "two hundred fifty-nine thousand, seven hundred five".