128479 has 4 divisors (see below), whose sum is σ = 138376. Its totient is φ = 118584.

The previous prime is 128477. The next prime is 128483. The reversal of 128479 is 974821.

128479 is nontrivially palindromic in base 7.

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 128479 - 2¹ = 128477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128473) 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, 4929 + ... + 4954.

It is an arithmetic number, because the mean of its divisors is an integer number (34594).

2¹²⁸⁴⁷⁹ is an apocalyptic number.

128479 is a deficient number, since it is larger than the sum of its proper divisors (9897).

128479 is an equidigital number, since it uses as much as digits as its factorization.

128479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896.

The product of its digits is 4032, while the sum is 31.

The square root of 128479 is about 358.4396741434. The cubic root of 128479 is about 50.4596285518.

The spelling of 128479 in words is "one hundred twenty-eight thousand, four hundred seventy-nine".