128004 has 12 divisors (see below), whose sum is σ = 298704. Its totient is φ = 42664.

The previous prime is 127997. The next prime is 128021. The reversal of 128004 is 400821.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

128004 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5322 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (24892).

2¹²⁸⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

128004 is an abundant number, since it is smaller than the sum of its proper divisors (170700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128004 is a wasteful number, since it uses less digits than its factorization.

128004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10674 (or 10672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 128004 is about 357.7764665262. The cubic root of 128004 is about 50.3973669574.

Adding to 128004 its reverse (400821), we get a palindrome (528825).

The spelling of 128004 in words is "one hundred twenty-eight thousand, four".