128547289 has 8 divisors (see below), whose sum is σ = 138674312. Its totient is φ = 118454400.

The previous prime is 128547281. The next prime is 128547301. The reversal of 128547289 is 982745821.

It can be written as a sum of positive squares in 4 ways, for example, as 45427600 + 83119689 = 6740^2 + 9117^2 .

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 128547289 - 2³ = 128547281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128547281) 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, 414 + ... + 16039.

It is an arithmetic number, because the mean of its divisors is an integer number (17334289).

Almost surely, 2^128547289 is an apocalyptic number.

It is an amenable number.

128547289 is a deficient number, since it is larger than the sum of its proper divisors (10127023).

128547289 is a wasteful number, since it uses less digits than its factorization.

128547289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17067.

The product of its digits is 322560, while the sum is 46.

The square root of 128547289 is about 11337.8696852627. The cubic root of 128547289 is about 504.6856704826.

The spelling of 128547289 in words is "one hundred twenty-eight million, five hundred forty-seven thousand, two hundred eighty-nine".