259761 has 4 divisors (see below), whose sum is σ = 346352. Its totient is φ = 173172.

The previous prime is 259751. The next prime is 259771. The reversal of 259761 is 167952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (259751) and next prime (259771).

It is not a de Polignac number, because 259761 - 2⁶ = 259697 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (259751) 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, 43291 + ... + 43296.

It is an arithmetic number, because the mean of its divisors is an integer number (86588).

2²⁵⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

259761 is a deficient number, since it is larger than the sum of its proper divisors (86591).

259761 is an equidigital number, since it uses as much as digits as its factorization.

259761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86590.

The product of its digits is 3780, while the sum is 30.

The square root of 259761 is about 509.6675386956. The cubic root of 259761 is about 63.8054803454.

Subtracting from 259761 its reverse (167952), we obtain a square (91809 = 303²).

The spelling of 259761 in words is "two hundred fifty-nine thousand, seven hundred sixty-one".