128579 has 4 divisors (see below), whose sum is σ = 140280. Its totient is φ = 116880.

The previous prime is 128563. The next prime is 128591. The reversal of 128579 is 975821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128579 - 2⁴ = 128563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128509) 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, 5834 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (35070).

2¹²⁸⁵⁷⁹ is an apocalyptic number.

128579 is a deficient number, since it is larger than the sum of its proper divisors (11701).

128579 is a wasteful number, since it uses less digits than its factorization.

128579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700.

The product of its digits is 5040, while the sum is 32.

The square root of 128579 is about 358.5791404976. The cubic root of 128579 is about 50.4727166940.

It can be divided in two parts, 128 and 579, that added together give a palindrome (707).

The spelling of 128579 in words is "one hundred twenty-eight thousand, five hundred seventy-nine".