999999120 has 80 divisors (see below), whose sum is σ = 3146316480. Its totient is φ = 262682112.

The previous prime is 999999113. The next prime is 999999131. The reversal of 999999120 is 21999999.

999999120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15015 + ... + 47174.

It is an arithmetic number, because the mean of its divisors is an integer number (39328956).

Almost surely, 2^999999120 is an apocalyptic number.

It is an amenable number.

999999120 is an abundant number, since it is smaller than the sum of its proper divisors (2146317360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999120 is a wasteful number, since it uses less digits than its factorization.

999999120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62272 (or 62266 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 57.

The square root of 999999120 is about 31622.7626876590. The cubic root of 999999120 is about 999.9997066666. Note that the first 3 decimals are identical.

The spelling of 999999120 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred twenty".