128915271 has 12 divisors (see below), whose sum is σ = 186421872. Its totient is φ = 85846176.

The previous prime is 128915261. The next prime is 128915279. The reversal of 128915271 is 172519821.

It is a happy number.

128915271 is a `hidden beast` number, since 128 + 9 + 1 + 527 + 1 = 666.

It is not a de Polignac number, because 128915271 - 2¹¹ = 128913223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128915279) 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 11 ways as a sum of consecutive naturals, for example, 790 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (15535156).

Almost surely, 2^128915271 is an apocalyptic number.

128915271 is a deficient number, since it is larger than the sum of its proper divisors (57506601).

128915271 is a wasteful number, since it uses less digits than its factorization.

128915271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230 (or 16227 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 128915271 is about 11354.0860926805. The cubic root of 128915271 is about 505.1667860690.

The spelling of 128915271 in words is "one hundred twenty-eight million, nine hundred fifteen thousand, two hundred seventy-one".