120128135 has 4 divisors (see below), whose sum is σ = 144153768. Its totient is φ = 96102504.

The previous prime is 120128117. The next prime is 120128147. The reversal of 120128135 is 531821021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120128135 - 2⁸ = 120127879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120128135.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12012809 + ... + 12012818.

It is an arithmetic number, because the mean of its divisors is an integer number (36038442).

Almost surely, 2^120128135 is an apocalyptic number.

120128135 is a deficient number, since it is larger than the sum of its proper divisors (24025633).

120128135 is an equidigital number, since it uses as much as digits as its factorization.

120128135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24025632.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 120128135 is about 10960.2981255074. The cubic root of 120128135 is about 493.4179124627.

Adding to 120128135 its reverse (531821021), we get a palindrome (651949156).

The spelling of 120128135 in words is "one hundred twenty million, one hundred twenty-eight thousand, one hundred thirty-five".