128025717 has 8 divisors (see below), whose sum is σ = 171847200. Its totient is φ = 84777360.

The previous prime is 128025713. The next prime is 128025719. The reversal of 128025717 is 717520821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128025717 - 2² = 128025713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128025713) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 142759 + ... + 143652.

It is an arithmetic number, because the mean of its divisors is an integer number (21480900).

Almost surely, 2^128025717 is an apocalyptic number.

It is an amenable number.

128025717 is a deficient number, since it is larger than the sum of its proper divisors (43821483).

128025717 is a wasteful number, since it uses less digits than its factorization.

128025717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286563.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 128025717 is about 11314.8449834719. The cubic root of 128025717 is about 504.0021691454.

The spelling of 128025717 in words is "one hundred twenty-eight million, twenty-five thousand, seven hundred seventeen".