128303 has 4 divisors (see below), whose sum is σ = 146640. Its totient is φ = 109968.

The previous prime is 128291. The next prime is 128311. The reversal of 128303 is 303821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303821 = 7 ⋅43403.

It is a cyclic number.

It is not a de Polignac number, because 128303 - 2⁴ = 128287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128393) 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, 9158 + ... + 9171.

It is an arithmetic number, because the mean of its divisors is an integer number (36660).

2¹²⁸³⁰³ is an apocalyptic number.

128303 is a deficient number, since it is larger than the sum of its proper divisors (18337).

128303 is an equidigital number, since it uses as much as digits as its factorization.

128303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18336.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 128303 is about 358.1940814698. The cubic root of 128303 is about 50.4365769171.

The spelling of 128303 in words is "one hundred twenty-eight thousand, three hundred three".