128701 has 4 divisors (see below), whose sum is σ = 129600. Its totient is φ = 127804.

The previous prime is 128693. The next prime is 128717. The reversal of 128701 is 107821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128701 - 2³ = 128693 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2¹²⁸⁷⁰¹ is an apocalyptic number.

It is an amenable number.

128701 is a deficient number, since it is larger than the sum of its proper divisors (899).

128701 is an equidigital number, since it uses as much as digits as its factorization.

128701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 128701 is about 358.7492160270. The cubic root of 128701 is about 50.4886750411.

The spelling of 128701 in words is "one hundred twenty-eight thousand, seven hundred one".