128427 has 16 divisors (see below), whose sum is σ = 191520. Its totient is φ = 76032.

The previous prime is 128413. The next prime is 128431. The reversal of 128427 is 724821.

128427 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 128427 - 2⁴ = 128411 is a prime.

128427 is strictly pandigital in base 7.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 128397 and 128406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128427.

It is not an unprimeable number, because it can be changed into a prime (128437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2¹²⁸⁴²⁷ is an apocalyptic number.

128427 is a deficient number, since it is larger than the sum of its proper divisors (63093).

128427 is a wasteful number, since it uses less digits than its factorization.

128427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142.

The product of its digits is 896, while the sum is 24.

The square root of 128427 is about 358.3671301891. The cubic root of 128427 is about 50.4528200338.

It can be divided in two parts, 128 and 427, that added together give a palindrome (555).

The spelling of 128427 in words is "one hundred twenty-eight thousand, four hundred twenty-seven".