999212 has 12 divisors (see below), whose sum is σ = 1824816. Its totient is φ = 477840.

The previous prime is 999199. The next prime is 999217. The reversal of 999212 is 212999.

It is not an unprimeable number, because it can be changed into a prime (999217) 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 3 ways as a sum of consecutive naturals, for example, 5339 + ... + 5522.

It is an arithmetic number, because the mean of its divisors is an integer number (152068).

2⁹⁹⁹²¹² is an apocalyptic number.

999212 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

999212 is a deficient number, since it is larger than the sum of its proper divisors (825604).

999212 is a wasteful number, since it uses less digits than its factorization.

999212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888 (or 10886 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 999212 is about 999.6059223514. The cubic root of 999212 is about 99.9737264309.

The spelling of 999212 in words is "nine hundred ninety-nine thousand, two hundred twelve".