128695 has 8 divisors (see below), whose sum is σ = 176544. Its totient is φ = 88224.

The previous prime is 128693. The next prime is 128717. The reversal of 128695 is 596821.

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 128695 - 2¹ = 128693 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128693) 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, 1804 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (22068).

2¹²⁸⁶⁹⁵ is an apocalyptic number.

128695 is a deficient number, since it is larger than the sum of its proper divisors (47849).

128695 is an equidigital number, since it uses as much as digits as its factorization.

128695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689.

The product of its digits is 4320, while the sum is 31.

The square root of 128695 is about 358.7408535419. The cubic root of 128695 is about 50.4878904402.

The spelling of 128695 in words is "one hundred twenty-eight thousand, six hundred ninety-five".