120135509 has 24 divisors (see below), whose sum is σ = 140262912. Its totient is φ = 102548160.

The previous prime is 120135497. The next prime is 120135511. The reversal of 120135509 is 905531021.

It is not a de Polignac number, because 120135509 - 2¹² = 120131413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120135529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119999 + ... + 120995.

It is an arithmetic number, because the mean of its divisors is an integer number (5844288).

Almost surely, 2^120135509 is an apocalyptic number.

It is an amenable number.

120135509 is a deficient number, since it is larger than the sum of its proper divisors (20127403).

120135509 is a wasteful number, since it uses less digits than its factorization.

120135509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 120135509 is about 10960.6345163042. The cubic root of 120135509 is about 493.4280083192.

The spelling of 120135509 in words is "one hundred twenty million, one hundred thirty-five thousand, five hundred nine".