1,855
1,855 is a composite number, odd, a calendar year.
1,855 (one thousand eight hundred fifty-five) is an odd 4-digit number. It is a composite number with 8 divisors, and factors as 5 × 7 × 53. Written other ways, in Roman numerals it is MDCCCLV and in binary, 11100111111.
Interestingness
Notable events — 1855 AD
- Mar 2 Tsar Alexander II succeeds Nicholas I in Russia.
- Sep 11 Allied forces capture Sevastopol, ending the main fighting of the Crimean War.
- Jun 5 The American Party ("Know-Nothings") holds its first national convention.
- Jul 4 Walt Whitman self-publishes Leaves of Grass.
- Nov 16 David Livingstone becomes the first European to see Victoria Falls.
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
-
Monday
January 1, 1855
- Ended on
-
Monday
December 31, 1855
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 8
Sunday, April 8, 1855
- Decade
-
1850s
1850–1859
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
171
171 years before 2026.
In other calendars
- Hebrew
-
5615 / 5616 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1271 / 1272 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Rabbit
Sexagenary cycle position 52 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2398 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1233 / 1234 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1847 / 1848 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1777 / 1776 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 5 × 7 × 53
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,855 = [43; (14, 2, 1, 8, 1, 8, 1, 2, 14, 86)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- one thousand eight hundred fifty-five
- Ordinal
- 1855th
- Roman numeral
- MDCCCLV
- Binary
- 11100111111
- Octal
- 3477
- Hexadecimal
- 0x73F
- Base64
- Bz8=
- One's complement
- 63,680 (16-bit)
- Scientific notation
- 1.855 × 10³
- As a duration
- 1,855 s = 30 minutes, 55 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωνεʹ
- Mayan (base 20)
- 𝋤·𝋬·𝋯
- Chinese
- 一千八百五十五
- Chinese (financial)
- 壹仟捌佰伍拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,855 = 2
- e — Euler's number (e)
- Digit 1,855 = 5
- φ — Golden ratio (φ)
- Digit 1,855 = 4
- √2 — Pythagoras's (√2)
- Digit 1,855 = 4
- ln 2 — Natural log of 2
- Digit 1,855 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,855 = 2
Also seen as
UTF-8 encoding: DC BF (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.63.
- Address
- 0.0.7.63
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.63
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,855 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯6 (1864.7 Hz, -9¢)
- Scientific pitch (C4 = 256 Hz): A♯6 (1824.6 Hz, +29¢)
- Baroque pitch (A4 = 415 Hz): B6 (1863.3 Hz, -8¢)
The digit sequence 1855 first appears in π at position 2,220 of the decimal expansion (the 2,220ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.