999255 has 8 divisors (see below), whose sum is σ = 1598832. Its totient is φ = 532928.

The previous prime is 999239. The next prime is 999269. The reversal of 999255 is 552999.

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 999255 - 2⁴ = 999239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33294 + ... + 33323.

It is an arithmetic number, because the mean of its divisors is an integer number (199854).

2⁹⁹⁹²⁵⁵ is an apocalyptic number.

999255 is a deficient number, since it is larger than the sum of its proper divisors (599577).

999255 is a wasteful number, since it uses less digits than its factorization.

999255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66625.

The product of its digits is 36450, while the sum is 39.

The square root of 999255 is about 999.6274305960. The cubic root of 999255 is about 99.9751604972.

The spelling of 999255 in words is "nine hundred ninety-nine thousand, two hundred fifty-five".