128504 has 8 divisors (see below), whose sum is σ = 240960. Its totient is φ = 64248.

The previous prime is 128489. The next prime is 128509. The reversal of 128504 is 405821.

128504 = 82² + 83² + ... + 97².

128504 is nontrivially palindromic in base 3.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128509) by changing a digit.

128504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8024 + ... + 8039.

It is an arithmetic number, because the mean of its divisors is an integer number (30120).

2¹²⁸⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

128504 is a deficient number, since it is larger than the sum of its proper divisors (112456).

128504 is a wasteful number, since it uses less digits than its factorization.

128504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16069 (or 16065 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 128504 is about 358.4745458188. The cubic root of 128504 is about 50.4629012239.

The spelling of 128504 in words is "one hundred twenty-eight thousand, five hundred four".