120405309 has 8 divisors (see below), whose sum is σ = 160638720. Its totient is φ = 80221056.

The previous prime is 120405301. The next prime is 120405317. The reversal of 120405309 is 903504021.

It is an interprime number because it is at equal distance from previous prime (120405301) and next prime (120405317).

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

It is not a de Polignac number, because 120405309 - 2³ = 120405301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120405301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6132 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (20079840).

Almost surely, 2^120405309 is an apocalyptic number.

It is an amenable number.

120405309 is a deficient number, since it is larger than the sum of its proper divisors (40233411).

120405309 is a wasteful number, since it uses less digits than its factorization.

120405309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24579.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 120405309 is about 10972.9352955351. The cubic root of 120405309 is about 493.7971119069.

The spelling of 120405309 in words is "one hundred twenty million, four hundred five thousand, three hundred nine".