128355 has 16 divisors (see below), whose sum is σ = 211200. Its totient is φ = 66528.

The previous prime is 128351. The next prime is 128377. The reversal of 128355 is 553821.

It is not a de Polignac number, because 128355 - 2² = 128351 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (128351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546 + ... + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (13200).

2¹²⁸³⁵⁵ is an apocalyptic number.

128355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128355 is a deficient number, since it is larger than the sum of its proper divisors (82845).

128355 is a wasteful number, since it uses less digits than its factorization.

128355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its digits is 1200, while the sum is 24.

The square root of 128355 is about 358.2666604640. The cubic root of 128355 is about 50.4433898203.

The spelling of 128355 in words is "one hundred twenty-eight thousand, three hundred fifty-five".