128544985 has 8 divisors (see below), whose sum is σ = 155696256. Its totient is φ = 101874480.

The previous prime is 128544979. The next prime is 128544989. The reversal of 128544985 is 589445821.

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

It is not a de Polignac number, because 128544985 - 2¹⁵ = 128512217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128544989) 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, 119601 + ... + 120670.

It is an arithmetic number, because the mean of its divisors is an integer number (19462032).

Almost surely, 2^128544985 is an apocalyptic number.

It is an amenable number.

128544985 is a deficient number, since it is larger than the sum of its proper divisors (27151271).

128544985 is a wasteful number, since it uses less digits than its factorization.

128544985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240383.

The product of its digits is 460800, while the sum is 46.

The square root of 128544985 is about 11337.7680784183. The cubic root of 128544985 is about 504.6826552427.

The spelling of 128544985 in words is "one hundred twenty-eight million, five hundred forty-four thousand, nine hundred eighty-five".