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Number

130

130 is a composite number, even, a calendar year.

Deficient Number Evil Number Gapful Number Happy Number Pernicious Number Recamán's Sequence Sphenic Number Squarefree Year

Historical context — 130 AD

Calendar year

Year 130 (CXXX) was a common year starting on Saturday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 130 BC

Calendar year

Year 130 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Sunday
January 1, 130
Ended on: Sunday
December 31, 130
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 130s
130–139
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,896
1896 years before 2026.

In other calendars

Hebrew: 3890 / 3891 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Horse
Sexagenary cycle position 7 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 673 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 122 / 123 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 52 / 51 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 4
Digit product: 0
Digital root: 4
Palindrome: No
Bit width: 8 bits
Reversed: 31
Recamán's sequence: a(140) = 130
Square (n²): 16,900
Cube (n³): 2,197,000
Divisor count: 8
σ(n) — sum of divisors: 252
φ(n) — Euler's totient: 48
Sum of prime factors: 20

Primality

Prime factorization: 2 × 5 × 13

Nearest primes: 127 (−3) · 131 (+1)

Divisors & multiples

All divisors (8)

1 · 2 · 5 · 10 · 13 · 26 · 65 (half) · 130

Aliquot sum (sum of proper divisors): 122

Factor pairs (a × b = 130)

1 × 130

2 × 65

5 × 26

10 × 13

First multiples

130 · 260 (double) · 390 · 520 · 650 · 780 · 910 · 1,040 · 1,170 · 1,300

Sums & aliquot sequence

As a sum of two squares: 3² + 11² = 7² + 9²

As consecutive integers: 31 + 32 + 33 + 34 24 + 25 + 26 + 27 + 28 4 + 5 + … + 16

Aliquot sequence: 130 → 122 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: one hundred thirty
Ordinal: 130th
Roman numeral: CXXX
Binary: 10000010
Octal: 202
Hexadecimal: 0x82
Base64: gg==
One's complement: 125 (8-bit)

In other bases

ternary (3) 11211

quaternary (4) 2002

quinary (5) 1010

senary (6) 334

septenary (7) 244

nonary (9) 154

undecimal (11) 109

duodecimal (12) aa

tridecimal (13) a0

tetradecimal (14) 94

pentadecimal (15) 8a

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆
Greek (Milesian): ρλʹ
Mayan (base 20): 𝋦·𝋪
Chinese: 一百三十
Chinese (financial): 壹佰參拾

In other modern scripts

Eastern Arabic ١٣٠ Devanagari १३० Bengali ১৩০ Tamil ௧௩௦ Thai ๑๓๐ Tibetan ༡༣༠ Khmer ១៣០ Lao ໑໓໐ Burmese ၁၃၀

Digit at this position in famous constants

π — Pi (π): Digit 130 = 9
e — Euler's number (e): Digit 130 = 6
φ — Golden ratio (φ): Digit 130 = 2
√2 — Pythagoras's (√2): Digit 130 = 5
ln 2 — Natural log of 2: Digit 130 = 5
γ — Euler-Mascheroni (γ): Digit 130 = 4

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 130, here are decompositions:

3 + 127 = 130
17 + 113 = 130
23 + 107 = 130
29 + 101 = 130
41 + 89 = 130
47 + 83 = 130
59 + 71 = 130

Unicode codepoint

Break Permitted Here

U+0082

Control character (Cc)

UTF-8 encoding: C2 82 (2 bytes).

Lookup U+0082 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000082

RGB(0, 0, 130)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.130.

Address: 0.0.0.130
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.130

Unspecified address (0.0.0.0/8) — "this network" placeholder.