259778 has 8 divisors (see below), whose sum is σ = 392268. Its totient is φ = 129024.

The previous prime is 259771. The next prime is 259781. The reversal of 259778 is 877952.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 12769 = 497^2 + 113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 259778.

It is not an unprimeable number, because it can be changed into a prime (259771) 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, 50 + ... + 722.

2²⁵⁹⁷⁷⁸ is an apocalyptic number.

259778 is a deficient number, since it is larger than the sum of its proper divisors (132490).

259778 is a wasteful number, since it uses less digits than its factorization.

259778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 35280, while the sum is 38.

The square root of 259778 is about 509.6842159612. The cubic root of 259778 is about 63.8068722268.

It can be divided in two parts, 2597 and 78, that multiplied together give a triangular number (202566 = T₆₃₆).

The spelling of 259778 in words is "two hundred fifty-nine thousand, seven hundred seventy-eight".