128023 has 4 divisors (see below), whose sum is σ = 146320. Its totient is φ = 109728.

The previous prime is 128021. The next prime is 128033. The reversal of 128023 is 320821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128023 - 2¹ = 128021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127988 and 128006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128021) 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, 9138 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (36580).

2¹²⁸⁰²³ is an apocalyptic number.

128023 is a deficient number, since it is larger than the sum of its proper divisors (18297).

128023 is an equidigital number, since it uses as much as digits as its factorization.

128023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18296.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 128023 is about 357.8030184333. The cubic root of 128023 is about 50.3998603759.

Adding to 128023 its reverse (320821), we get a palindrome (448844).

The spelling of 128023 in words is "one hundred twenty-eight thousand, twenty-three".