123003 has 12 divisors (see below), whose sum is σ = 180960. Its totient is φ = 80496.

The previous prime is 123001. The next prime is 123007. The reversal of 123003 is 300321.

It is a happy number.

It is not a de Polignac number, because 123003 - 2¹ = 123001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (123001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625 + ... + 797.

It is an arithmetic number, because the mean of its divisors is an integer number (15080).

2¹²³⁰⁰³ is an apocalyptic number.

123003 is a deficient number, since it is larger than the sum of its proper divisors (57957).

123003 is a wasteful number, since it uses less digits than its factorization.

123003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 123003 is about 350.7178353035. The cubic root of 123003 is about 49.7323026538.

Adding to 123003 its reverse (300321), we get a palindrome (423324).

The spelling of 123003 in words is "one hundred twenty-three thousand, three", and thus it is an iban number.