1,842
1,842 is a composite number, even, a calendar year.
Notable events — 1842 AD
- Aug 29 Britain and China sign the Treaty of Nanking, ending the First Opium War and ceding Hong Kong.
- Aug 9 The Webster-Ashburton Treaty resolves US-Canadian border disputes.
- Aug 30 Britain abolishes the gibbet.
- Dec 12 The Massachusetts Supreme Court upholds the right of labor to organize.
- Nov 1 Britain's withdrawal from Afghanistan ends in disaster at Gandamak.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Saturday
January 1, 1842
- Ended on
-
Saturday
December 31, 1842
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
March 27
Sunday, March 27, 1842
- Decade
-
1840s
1840–1849
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
184
184 years before 2026.
In other calendars
- Hebrew
-
5602 / 5603 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1257 / 1258 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Tiger
Sexagenary cycle position 39 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2385 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1220 / 1221 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1834 / 1835 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1764 / 1763 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 15
- Digit product
- 64
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 2,481
- Recamán's sequence
- a(8,060) = 1,842
- Square (n²)
- 3,392,964
- Cube (n³)
- 6,249,839,688
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,696
- φ(n) — Euler's totient
- 612
- Sum of prime factors
- 312
Primality
Prime factorization: 2 × 3 × 307
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred forty-two
- Ordinal
- 1842nd
- Roman numeral
- MDCCCXLII
- Binary
- 11100110010
- Octal
- 3462
- Hexadecimal
- 0x732
- Base64
- BzI=
- One's complement
- 63,693 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵αωμβʹ
- Mayan (base 20)
- 𝋤·𝋬·𝋢
- Chinese
- 一千八百四十二
- Chinese (financial)
- 壹仟捌佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,842 = 2
- e — Euler's number (e)
- Digit 1,842 = 1
- φ — Golden ratio (φ)
- Digit 1,842 = 4
- √2 — Pythagoras's (√2)
- Digit 1,842 = 2
- ln 2 — Natural log of 2
- Digit 1,842 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,842 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1842, here are decompositions:
- 11 + 1831 = 1842
- 19 + 1823 = 1842
- 31 + 1811 = 1842
- 41 + 1801 = 1842
- 53 + 1789 = 1842
- 59 + 1783 = 1842
- 83 + 1759 = 1842
- 89 + 1753 = 1842
Showing the first eight; more decompositions exist.
UTF-8 encoding: DC B2 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.50.
- Address
- 0.0.7.50
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.50
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1842 first appears in π at position 1,738 of the decimal expansion (the 1,738ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.