number.wiki
Number

1,289

1,289 is a prime, odd, a calendar year.

Deficient Number Prime Sexy Prime Squarefree Twin Prime Year

Properties

Parity
Odd
Digit count
4
Digit sum
20
Digital root
2
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
1,290

Primality

1,289 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 1289
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 1,289)
1 × 1289
First multiples
1,289 · 2,578 · 3,867 · 5,156 · 6,445 · 7,734 · 9,023 · 10,312 · 11,601 · 12,890

Representations

In words
one thousand two hundred eighty-nine
Ordinal
1289th
Roman numeral
MCCLXXXIX
Binary
10100001001
Octal
2411
Hexadecimal
509

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 1,283 (gap of 6)
  • Next prime: 1,291 (gap of 2)

Pair status: twin with 1291, sexy with 1283.

Unicode codepoint
ԉ
U+0509
Lowercase letter (Ll)

UTF-8 encoding: D4 89 (2 bytes).

Lookup U+0509 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000509
RGB(0, 5, 9)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.9.