128707 has 8 divisors (see below), whose sum is σ = 139536. Its totient is φ = 118272.

The previous prime is 128693. The next prime is 128717. The reversal of 128707 is 707821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128707 is a prime.

It is a plaindrome in base 13.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128707.

It is not an unprimeable number, because it can be changed into a prime (128717) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1083 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (17442).

2¹²⁸⁷⁰⁷ is an apocalyptic number.

128707 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128707 is a deficient number, since it is larger than the sum of its proper divisors (10829).

128707 is a wasteful number, since it uses less digits than its factorization.

128707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 128707 is about 358.7575783172. The cubic root of 128707 is about 50.4894596176.

The spelling of 128707 in words is "one hundred twenty-eight thousand, seven hundred seven".