128560 has 20 divisors (see below), whose sum is σ = 299088. Its totient is φ = 51392.

The previous prime is 128551. The next prime is 128563. The reversal of 128560 is 65821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a plaindrome in base 14.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (128563) by changing a digit.

128560 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 in 3 ways as a sum of consecutive naturals, for example, 724 + ... + 883.

2¹²⁸⁵⁶⁰ is an apocalyptic number.

128560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128560 is an abundant number, since it is smaller than the sum of its proper divisors (170528).

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

128560 is a wasteful number, since it uses less digits than its factorization.

128560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 128560 is about 358.5526460647. The cubic root of 128560 is about 50.4702304693.

It can be divided in two parts, 1 and 28560, that added together give a 4-th power (28561 = 13⁴).

The spelling of 128560 in words is "one hundred twenty-eight thousand, five hundred sixty".