259987 has 8 divisors (see below), whose sum is σ = 320096. Its totient is φ = 205632.

The previous prime is 259967. The next prime is 259991. The reversal of 259987 is 789952.

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

It is not a de Polignac number, because 259987 - 2¹⁵ = 227219 is a prime.

259987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (259907) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1338 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (40012).

2²⁵⁹⁹⁸⁷ is an apocalyptic number.

259987 is a deficient number, since it is larger than the sum of its proper divisors (60109).

259987 is a wasteful number, since it uses less digits than its factorization.

259987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877.

The product of its digits is 45360, while the sum is 40.

The square root of 259987 is about 509.8892036511. The cubic root of 259987 is about 63.8239792202.

The spelling of 259987 in words is "two hundred fifty-nine thousand, nine hundred eighty-seven".