It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a nialpdrome in base 10.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999995.
It is an unprimeable number.
2999995 is an apocalyptic number.
999995 is a wasteful number, since it uses less digits than its factorization.
999995 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 200004.
The square root of 999995 is about 999.9974999969. The cubic root of 999995 is about 99.9998333331. Note that the first 3 decimals are identical.
The spelling of 999995 in words is "nine hundred ninety-nine thousand, nine hundred ninety-five".