120009 has 8 divisors (see below), whose sum is σ = 161920. Its totient is φ = 79056.

The previous prime is 119993. The next prime is 120011. The reversal of 120009 is 900021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120009 - 2⁴ = 119993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 119976 and 120003.

It is not an unprimeable number, because it can be changed into a prime (120049) 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, 144 + ... + 510.

It is an arithmetic number, because the mean of its divisors is an integer number (20240).

2¹²⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

120009 is a deficient number, since it is larger than the sum of its proper divisors (41911).

120009 is a wasteful number, since it uses less digits than its factorization.

120009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 120009 is about 346.4231516513. The cubic root of 120009 is about 49.3254745618.

Adding to 120009 its sum of digits (12), we get a palindrome (120021).

The spelling of 120009 in words is "one hundred twenty thousand, nine".