120309 has 16 divisors (see below), whose sum is σ = 194688. Its totient is φ = 64512.

The previous prime is 120299. The next prime is 120319. The reversal of 120309 is 903021.

It is an interprime number because it is at equal distance from previous prime (120299) and next prime (120319).

It is not a de Polignac number, because 120309 - 2⁴ = 120293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (12168).

2¹²⁰³⁰⁹ is an apocalyptic number.

It is an amenable number.

120309 is a deficient number, since it is larger than the sum of its proper divisors (74379).

120309 is a wasteful number, since it uses less digits than its factorization.

120309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 120309 is about 346.8558778513. The cubic root of 120309 is about 49.3665418402.

The spelling of 120309 in words is "one hundred twenty thousand, three hundred nine".