120999 has 8 divisors (see below), whose sum is σ = 164592. Its totient is φ = 79040.

The previous prime is 120997. The next prime is 121001. The reversal of 120999 is 999021.

It is an interprime number because it is at equal distance from previous prime (120997) and next prime (121001).

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 120999 - 2¹ = 120997 is a prime.

120999 is a modest number, since divided by 999 gives 120 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120997) 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, 222 + ... + 539.

It is an arithmetic number, because the mean of its divisors is an integer number (20574).

2¹²⁰⁹⁹⁹ is an apocalyptic number.

120999 is a deficient number, since it is larger than the sum of its proper divisors (43593).

120999 is an equidigital number, since it uses as much as digits as its factorization.

120999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 120999 is about 347.8491052166. The cubic root of 120999 is about 49.4607381763.

The spelling of 120999 in words is "one hundred twenty thousand, nine hundred ninety-nine".