1,725
1,725 is a composite number, odd, a calendar year.
Notable events — 1725 AD
- Feb 8 Peter the Great dies; Catherine I succeeds him.
- Apr 30 The Treaty of Vienna allies Austria and Spain.
- Sep 3 France and Britain sign the Treaty of Hanover.
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, 1725
- Ended on
-
Monday
December 31, 1725
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 1
Sunday, April 1, 1725
- Decade
-
1720s
1720–1729
- Century
-
18th century
1701–1800
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
301
301 years before 2026.
In other calendars
- Hebrew
-
5485 / 5486 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1137 / 1138 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Snake
Sexagenary cycle position 42 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2268 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1103 / 1104 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1717 / 1718 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1647 / 1646 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 15
- Digit product
- 70
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 5,271
- Recamán's sequence
- a(1,190) = 1,725
- Square (n²)
- 2,975,625
- Cube (n³)
- 5,132,953,125
- Divisor count
- 12
- σ(n) — sum of divisors
- 2,976
- φ(n) — Euler's totient
- 880
- Sum of prime factors
- 36
Primality
Prime factorization: 3 × 5 2 × 23
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand seven hundred twenty-five
- Ordinal
- 1725th
- Roman numeral
- MDCCXXV
- Binary
- 11010111101
- Octal
- 3275
- Hexadecimal
- 0x6BD
- Base64
- Br0=
- One's complement
- 63,810 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αψκεʹ
- Mayan (base 20)
- 𝋤·𝋦·𝋥
- Chinese
- 一千七百二十五
- Chinese (financial)
- 壹仟柒佰貳拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,725 = 8
- e — Euler's number (e)
- Digit 1,725 = 5
- φ — Golden ratio (φ)
- Digit 1,725 = 2
- √2 — Pythagoras's (√2)
- Digit 1,725 = 3
- ln 2 — Natural log of 2
- Digit 1,725 = 9
- γ — Euler-Mascheroni (γ)
- Digit 1,725 = 0
Also seen as
UTF-8 encoding: DA BD (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.189.
- Address
- 0.0.6.189
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.189
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1725 first appears in π at position 138 of the decimal expansion (the 138ordinal-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.