259961 has 4 divisors (see below), whose sum is σ = 279972. Its totient is φ = 239952.

The previous prime is 259949. The next prime is 259967. The reversal of 259961 is 169952.

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 133225 + 126736 = 365^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 259961 - 2¹⁴ = 243577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 259961.

It is not an unprimeable number, because it can be changed into a prime (259967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9986 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (69993).

2²⁵⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

259961 is a deficient number, since it is larger than the sum of its proper divisors (20011).

259961 is a wasteful number, since it uses less digits than its factorization.

259961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010.

The product of its digits is 4860, while the sum is 32.

The square root of 259961 is about 509.8637072787. The cubic root of 259961 is about 63.8218515769.

Subtracting from 259961 its reverse (169952), we obtain a palindrome (90009).

The spelling of 259961 in words is "two hundred fifty-nine thousand, nine hundred sixty-one".