128459 has 4 divisors (see below), whose sum is σ = 135240. Its totient is φ = 121680.

The previous prime is 128449. The next prime is 128461. The reversal of 128459 is 954821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954821 = 7 ⋅136403.

It is a cyclic number.

It is not a de Polignac number, because 128459 - 2⁸ = 128203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3362 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (33810).

2¹²⁸⁴⁵⁹ is an apocalyptic number.

128459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128459 is a deficient number, since it is larger than the sum of its proper divisors (6781).

128459 is an equidigital number, since it uses as much as digits as its factorization.

128459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780.

The product of its digits is 2880, while the sum is 29.

The square root of 128459 is about 358.4117743602. The cubic root of 128459 is about 50.4570101085.

The spelling of 128459 in words is "one hundred twenty-eight thousand, four hundred fifty-nine".