1575

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 5 (3 unique) factors are:
3² = 9
5² = 25
7

Its 18 divisors are:
1
3
5
7
9
15
21
25
35
45
63
75
105
175
225
315
525
1575
Its aliquote sum is:
1649
makeing it a abundant number.

As Unicode codepoint (since version 1.1) this number represents this character:ا ARABIC LETTER ALEF in Arabic (Source: https://ucdapi.org/unicode/latest/codepoint/dec/1575); HTML: ا

The number appears at position 13628 of the decimal digits of π surrounded by
22506289058549145097157553900243931535190902 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: 794.744ms; cpu: 84.7860000000003ms)