128536 has 8 divisors (see below), whose sum is σ = 241020. Its totient is φ = 64264.

The previous prime is 128521. The next prime is 128549. The reversal of 128536 is 635821.

It is a happy number.

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

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128536.

It is a congruent number.

It is an unprimeable number.

128536 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, 8026 + ... + 8041.

2¹²⁸⁵³⁶ is an apocalyptic number.

It is an amenable number.

128536 is a deficient number, since it is larger than the sum of its proper divisors (112484).

128536 is a wasteful number, since it uses less digits than its factorization.

128536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16073 (or 16069 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 128536 is about 358.5191766140. The cubic root of 128536 is about 50.4670896248.

The spelling of 128536 in words is "one hundred twenty-eight thousand, five hundred thirty-six".