128659 has 2 divisors, whose sum is σ = 128660. Its totient is φ = 128658.

The previous prime is 128657. The next prime is 128663. The reversal of 128659 is 956821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128659 - 2¹ = 128657 is a prime.

Together with 128657, it forms a pair of twin primes.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128659.

It is not a weakly prime, because it can be changed into another prime (128657) 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 as a sum of consecutive naturals, namely, 64329 + 64330.

It is an arithmetic number, because the mean of its divisors is an integer number (64330).

2¹²⁸⁶⁵⁹ is an apocalyptic number.

128659 is a deficient number, since it is larger than the sum of its proper divisors (1).

128659 is an equidigital number, since it uses as much as digits as its factorization.

128659 is an odious number, because the sum of its binary digits is odd.

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

The square root of 128659 is about 358.6906745373. The cubic root of 128659 is about 50.4831823227.

It can be divided in two parts, 128 and 659, that added together give a palindrome (787).

The spelling of 128659 in words is "one hundred twenty-eight thousand, six hundred fifty-nine".