number.wiki
Number

4,001

4,001 is a prime, odd.

Deficient Number Prime Sexy Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
4
Digit sum
5
Digital root
5
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
4,002

Primality

4,001 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 4001
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 4,001)
1 × 4001
First multiples
4,001 · 8,002 · 12,003 · 16,004 · 20,005 · 24,006 · 28,007 · 32,008 · 36,009 · 40,010

Representations

In words
four thousand one
Ordinal
4001st
Binary
111110100001
Octal
7641
Hexadecimal
FA1

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 3,989 (gap of 12)
  • Next prime: 4,003 (gap of 2)

Pair status: twin with 4003.

Unicode codepoint
ྡ
U+0FA1
Non-spacing mark (Mn)

UTF-8 encoding: E0 BE A1 (3 bytes).

Lookup U+0FA1 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000FA1
RGB(0, 15, 161)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.161.