259887 has 4 divisors (see below), whose sum is σ = 346520. Its totient is φ = 173256.

The previous prime is 259867. The next prime is 259907. The reversal of 259887 is 788952.

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

It is an interprime number because it is at equal distance from previous prime (259867) and next prime (259907).

It is not a de Polignac number, because 259887 - 2⁶ = 259823 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259837) 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, 43312 + ... + 43317.

It is an arithmetic number, because the mean of its divisors is an integer number (86630).

2²⁵⁹⁸⁸⁷ is an apocalyptic number.

259887 is a deficient number, since it is larger than the sum of its proper divisors (86633).

259887 is an equidigital number, since it uses as much as digits as its factorization.

259887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86632.

The product of its digits is 40320, while the sum is 39.

The square root of 259887 is about 509.7911337009. The cubic root of 259887 is about 63.8157952002.

The spelling of 259887 in words is "two hundred fifty-nine thousand, eight hundred eighty-seven".