128395 has 4 divisors (see below), whose sum is σ = 154080. Its totient is φ = 102712.

The previous prime is 128393. The next prime is 128399. The reversal of 128395 is 593821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593821 = 67 ⋅8863.

It is a cyclic number.

It is not a de Polignac number, because 128395 - 2¹ = 128393 is a prime.

128395 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (128393) 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 3 ways as a sum of consecutive naturals, for example, 12835 + ... + 12844.

It is an arithmetic number, because the mean of its divisors is an integer number (38520).

2¹²⁸³⁹⁵ is an apocalyptic number.

128395 is a deficient number, since it is larger than the sum of its proper divisors (25685).

128395 is an equidigital number, since it uses as much as digits as its factorization.

128395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25684.

The product of its digits is 2160, while the sum is 28.

The square root of 128395 is about 358.3224804558. The cubic root of 128395 is about 50.4486292630.

It can be divided in two parts, 1283 and 95, that added together give a triangular number (1378 = T₅₂).

The spelling of 128395 in words is "one hundred twenty-eight thousand, three hundred ninety-five".