128135073 has 8 divisors (see below), whose sum is σ = 186378336. Its totient is φ = 77657600.

The previous prime is 128135071. The next prime is 128135087. The reversal of 128135073 is 370531821.

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

It is a cyclic number.

It is not a de Polignac number, because 128135073 - 2¹ = 128135071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128135073.

It is not an unprimeable number, because it can be changed into a prime (128135071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941408 + ... + 1941473.

It is an arithmetic number, because the mean of its divisors is an integer number (23297292).

Almost surely, 2^128135073 is an apocalyptic number.

It is an amenable number.

128135073 is a deficient number, since it is larger than the sum of its proper divisors (58243263).

128135073 is a wasteful number, since it uses less digits than its factorization.

128135073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882895.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 128135073 is about 11319.6763646316. The cubic root of 128135073 is about 504.1456298427.

Adding to 128135073 its reverse (370531821), we get a palindrome (498666894).

The spelling of 128135073 in words is "one hundred twenty-eight million, one hundred thirty-five thousand, seventy-three".