128807 has 4 divisors (see below), whose sum is σ = 147216. Its totient is φ = 110400.

The previous prime is 128767. The next prime is 128813. The reversal of 128807 is 708821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708821 = 433 ⋅1637.

It is a cyclic number.

It is not a de Polignac number, because 128807 - 2⁸ = 128551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128807.

It is not an unprimeable number, because it can be changed into a prime (128837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9194 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (36804).

2¹²⁸⁸⁰⁷ is an apocalyptic number.

128807 is a deficient number, since it is larger than the sum of its proper divisors (18409).

128807 is an equidigital number, since it uses as much as digits as its factorization.

128807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18408.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 128807 is about 358.8969211347. The cubic root of 128807 is about 50.5025323045.

The spelling of 128807 in words is "one hundred twenty-eight thousand, eight hundred seven".