1,685
1,685 is a composite number, odd, a calendar year.
Notable events — 1685 AD
- Feb 6 Charles II of England dies; his Catholic brother James II succeeds him.
- Jul 6 The Monmouth Rebellion is crushed at Sedgemoor.
- Oct 18 Louis XIV revokes the Edict of Nantes, expelling Huguenots from France.
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, 1685
- Ended on
-
Monday
December 31, 1685
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 22
Sunday, April 22, 1685
- Decade
-
1680s
1680–1689
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
341
341 years before 2026.
In other calendars
- Hebrew
-
5445 / 5446 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1096 / 1097 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Ox
Sexagenary cycle position 2 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2228 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1063 / 1064 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1677 / 1678 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1607 / 1606 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 5 × 337
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand six hundred eighty-five
- Ordinal
- 1685th
- Roman numeral
- MDCLXXXV
- Binary
- 11010010101
- Octal
- 3225
- Hexadecimal
- 0x695
- Base64
- BpU=
- One's complement
- 63,850 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αχπεʹ
- Mayan (base 20)
- 𝋤·𝋤·𝋥
- Chinese
- 一千六百八十五
- Chinese (financial)
- 壹仟陸佰捌拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,685 = 5
- e — Euler's number (e)
- Digit 1,685 = 2
- φ — Golden ratio (φ)
- Digit 1,685 = 1
- √2 — Pythagoras's (√2)
- Digit 1,685 = 1
- ln 2 — Natural log of 2
- Digit 1,685 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,685 = 6
Also seen as
UTF-8 encoding: DA 95 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.149.
- Address
- 0.0.6.149
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.149
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 1685 first appears in π at position 3,535 of the decimal expansion (the 3,535ordinal-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.