999259 has 8 divisors (see below), whose sum is σ = 1039680. Its totient is φ = 959616.

The previous prime is 999239. The next prime is 999269. The reversal of 999259 is 952999.

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

It is a cyclic number.

It is not a de Polignac number, because 999259 - 2¹⁵ = 966491 is a prime.

It is a super-3 number, since 3×999259³ = 2993335940508392937, which contains 333 as substring.

It is a Duffinian number.

999259 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (999239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4062 + ... + 4300.

It is an arithmetic number, because the mean of its divisors is an integer number (129960).

2⁹⁹⁹²⁵⁹ is an apocalyptic number.

999259 is a deficient number, since it is larger than the sum of its proper divisors (40421).

999259 is a wasteful number, since it uses less digits than its factorization.

999259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its digits is 65610, while the sum is 43.

The square root of 999259 is about 999.6294313394. The cubic root of 999259 is about 99.9752938966.

The spelling of 999259 in words is "nine hundred ninety-nine thousand, two hundred fifty-nine".