number.wiki
Number

1,420

1,420 is a composite number, even, a calendar year.

Abundant Number Year

Properties

Parity
Even
Digit count
4
Digit sum
7
Digital root
7
Palindrome
No
Divisor count
12
σ(n) — sum of divisors
3,024

Primality

Prime factorization: 2 2 × 5 × 71

Divisors & multiples

All divisors (12)
1 · 2 · 4 · 5 · 10 · 20 · 71 · 142 · 284 · 355 · 710 · 1420
Aliquot sum (sum of proper divisors): 1,604
Factor pairs (a × b = 1,420)
1 × 1420
2 × 710
4 × 355
5 × 284
10 × 142
20 × 71
First multiples
1,420 · 2,840 · 4,260 · 5,680 · 7,100 · 8,520 · 9,940 · 11,360 · 12,780 · 14,200

Representations

In words
one thousand four hundred twenty
Ordinal
1420th
Roman numeral
MCDXX
Binary
10110001100
Octal
2614
Hexadecimal
58C

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1420, here are decompositions:

  • 11 + 1409 = 1420
  • 47 + 1373 = 1420
  • 53 + 1367 = 1420
  • 59 + 1361 = 1420
  • 101 + 1319 = 1420
  • 113 + 1307 = 1420
  • 131 + 1289 = 1420
  • 137 + 1283 = 1420

Showing the first eight; more decompositions exist.

Hex color
#00058C
RGB(0, 5, 140)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.140.