128973125 has 20 divisors (see below), whose sum is σ = 164947200. Its totient is φ = 100758000.

The previous prime is 128973107. The next prime is 128973127. The reversal of 128973125 is 521379821.

It is not a de Polignac number, because 128973125 - 2⁸ = 128972869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128973127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24476 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (8247360).

Almost surely, 2^128973125 is an apocalyptic number.

It is an amenable number.

128973125 is a deficient number, since it is larger than the sum of its proper divisors (35974075).

128973125 is an frugal number, since it uses more digits than its factorization.

128973125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4847 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 128973125 is about 11356.6335240687. The cubic root of 128973125 is about 505.2423435731.

The spelling of 128973125 in words is "one hundred twenty-eight million, nine hundred seventy-three thousand, one hundred twenty-five".