128757 has 8 divisors (see below), whose sum is σ = 173376. Its totient is φ = 84992.

The previous prime is 128749. The next prime is 128761. The reversal of 128757 is 757821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128757 - 2³ = 128749 is a prime.

It is a plaindrome in base 14.

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 128757.

It is not an unprimeable number, because it can be changed into a prime (128717) 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, 373 + ... + 629.

It is an arithmetic number, because the mean of its divisors is an integer number (21672).

2¹²⁸⁷⁵⁷ is an apocalyptic number.

It is an amenable number.

128757 is a deficient number, since it is larger than the sum of its proper divisors (44619).

128757 is a wasteful number, since it uses less digits than its factorization.

128757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its digits is 3920, while the sum is 30.

The square root of 128757 is about 358.8272564898. The cubic root of 128757 is about 50.4959968071.

The spelling of 128757 in words is "one hundred twenty-eight thousand, seven hundred fifty-seven".