120399 has 8 divisors (see below), whose sum is σ = 163200. Its totient is φ = 78936.

The previous prime is 120397. The next prime is 120401. The reversal of 120399 is 993021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120397) and next prime (120401).

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

It is not a de Polignac number, because 120399 - 2¹ = 120397 is a prime.

120399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 500.

It is an arithmetic number, because the mean of its divisors is an integer number (20400).

2¹²⁰³⁹⁹ is an apocalyptic number.

120399 is a deficient number, since it is larger than the sum of its proper divisors (42801).

120399 is an equidigital number, since it uses as much as digits as its factorization.

120399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 120399 is about 346.9855904789. The cubic root of 120399 is about 49.3788487092.

The spelling of 120399 in words is "one hundred twenty thousand, three hundred ninety-nine".