128703 has 4 divisors (see below), whose sum is σ = 171608. Its totient is φ = 85800.

The previous prime is 128693. The next prime is 128717. The reversal of 128703 is 307821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 307821 = 3 ⋅102607.

It is not a de Polignac number, because 128703 - 2¹⁰ = 127679 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128703.

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 128703.

It is not an unprimeable number, because it can be changed into a prime (128203) 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, 21448 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (42902).

2¹²⁸⁷⁰³ is an apocalyptic number.

128703 is a deficient number, since it is larger than the sum of its proper divisors (42905).

128703 is an equidigital number, since it uses as much as digits as its factorization.

128703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42904.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 128703 is about 358.7520034787. The cubic root of 128703 is about 50.4889365693.

The spelling of 128703 in words is "one hundred twenty-eight thousand, seven hundred three".