128759 has 4 divisors (see below), whose sum is σ = 129480. Its totient is φ = 128040.

The previous prime is 128749. The next prime is 128761. The reversal of 128759 is 957821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128759 is a prime.

It is a Duffinian number.

Its product of digits (5040) is a multiple of the sum of its prime divisors (720).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128759.

It is not an unprimeable number, because it can be changed into a prime (128749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (32370).

2¹²⁸⁷⁵⁹ is an apocalyptic number.

128759 is a deficient number, since it is larger than the sum of its proper divisors (721).

128759 is an equidigital number, since it uses as much as digits as its factorization.

128759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its digits is 5040, while the sum is 32.

The square root of 128759 is about 358.8300433353. The cubic root of 128759 is about 50.4962582595.

The spelling of 128759 in words is "one hundred twenty-eight thousand, seven hundred fifty-nine".