128755 has 8 divisors (see below), whose sum is σ = 168624. Its totient is φ = 93600.

The previous prime is 128749. The next prime is 128761. The reversal of 128755 is 557821.

It is an interprime number because it is at equal distance from previous prime (128749) and next prime (128761).

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

It is not a de Polignac number, because 128755 - 2³ = 128747 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

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 7 ways as a sum of consecutive naturals, for example, 1116 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (21078).

2¹²⁸⁷⁵⁵ is an apocalyptic number.

128755 is a deficient number, since it is larger than the sum of its proper divisors (39869).

128755 is a wasteful number, since it uses less digits than its factorization.

128755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357.

The product of its digits is 2800, while the sum is 28.

The square root of 128755 is about 358.8244696227. The cubic root of 128755 is about 50.4957353521.

It can be divided in two parts, 12875 and 5, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 128755 in words is "one hundred twenty-eight thousand, seven hundred fifty-five".