128078125 has 28 divisors (see below), whose sum is σ = 183122656. Its totient is φ = 87750000.

The previous prime is 128078113. The next prime is 128078141. The reversal of 128078125 is 521870821.

It is a sliding number, since 128078125 = 78125 + 128000000 and 1/78125 + 1/128000000 = 0.0000128078125.

It is a de Polignac number, because none of the positive numbers 2^k-128078125 is a prime.

It is a super-2 number, since 2×128078125² = 32808012207031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 108790 + ... + 109960.

Almost surely, 2^128078125 is an apocalyptic number.

It is an amenable number.

128078125 is a deficient number, since it is larger than the sum of its proper divisors (55044531).

128078125 is an frugal number, since it uses more digits than its factorization.

128078125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 128078125 is about 11317.1606421399. The cubic root of 128078125 is about 504.0709317422.

It can be divided in two parts, 1280 and 78125, that multiplied together give a 8-th power (100000000 = 10⁸).

The spelling of 128078125 in words is "one hundred twenty-eight million, seventy-eight thousand, one hundred twenty-five".