123

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 2 (2 unique) factors are:
3
41

Its 4 divisors are:
1
3
41
123
Its aliquote sum is:
45
makeing it a deficient number.

As Unicode codepoint (since version 1.1) this number represents this character:{ LEFT CURLY BRACKET in ASCII (Source: https://ucdapi.org/unicode/latest/codepoint/dec/123); HTML: {

In the work of Johann Sebastian Bach BWV 123 is Liebster Immanuel, Herzog der Frommen

The number appears at position 1924 of the decimal digits of π surrounded by
4427862203919494504712371378696095636437191 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 1000.048ms; cpu: 92.0129999999997ms)