128570 has 32 divisors (see below), whose sum is σ = 266112. Its totient is φ = 44352.

The previous prime is 128563. The next prime is 128591. The reversal of 128570 is 75821.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2969 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (8316).

2¹²⁸⁵⁷⁰ is an apocalyptic number.

128570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128570 is an abundant number, since it is smaller than the sum of its proper divisors (137542).

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

128570 is a wasteful number, since it uses less digits than its factorization.

128570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 128570 is about 358.5665907471. The cubic root of 128570 is about 50.4715390392.

The spelling of 128570 in words is "one hundred twenty-eight thousand, five hundred seventy".