128871027 has 16 divisors (see below), whose sum is σ = 192676000. Its totient is φ = 85123872.

The previous prime is 128871019. The next prime is 128871049. The reversal of 128871027 is 720178821.

It is a happy number.

It is not a de Polignac number, because 128871027 - 2³ = 128871019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128870982 and 128871000.

It is not an unprimeable number, because it can be changed into a prime (128871427) 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 15 ways as a sum of consecutive naturals, for example, 18952 + ... + 24837.

It is an arithmetic number, because the mean of its divisors is an integer number (12042250).

Almost surely, 2^128871027 is an apocalyptic number.

128871027 is a deficient number, since it is larger than the sum of its proper divisors (63804973).

128871027 is a wasteful number, since it uses less digits than its factorization.

128871027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43907 (or 43901 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 128871027 is about 11352.1375520208. The cubic root of 128871027 is about 505.1089880116.

The spelling of 128871027 in words is "one hundred twenty-eight million, eight hundred seventy-one thousand, twenty-seven".