259988 has 6 divisors (see below), whose sum is σ = 454986.
Its totient is φ = 129992.
The previous prime is 259967. The next prime is 259991. The reversal of 259988 is 889952.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 174724 + 85264 = 418^2 + 292^2
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 259988.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32495 + ... + 32502.
It is an arithmetic number, because the mean of its divisors is an integer number (75831).
2259988 is an apocalyptic number.
It is an amenable number.
259988 is a deficient number, since it is larger than the sum of its proper divisors (194998).
259988 is a wasteful number, since it uses less digits than its factorization.
259988 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 65001 (or 64999 counting only the distinct ones).
The product of its digits is 51840, while the sum is 41.
The square root of 259988 is about 509.8901842554.
The cubic root of 259988 is about 63.8240610498.
The spelling of 259988 in words is "two hundred fifty-nine thousand, nine hundred eighty-eight".