1,425
1,425 is a composite number, odd, a calendar year.
Historical context — 1425 AD
Calendar year
Year 1425 (MCDXXV) was a common year starting on Monday of the Julian calendar.
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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, 1425
- Ended on
-
Saturday
December 31, 1425
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1420s
1420–1429
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
601
601 years before 2026.
In other calendars
- Hebrew
-
5185 / 5186 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
828 / 829 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
-
1968 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
803 / 804 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1417 / 1418 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1347 / 1346 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 12
- Digit product
- 40
- Digital root
- 3
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 5,241
- Recamán's sequence
- a(1,710) = 1,425
- Square (n²)
- 2,030,625
- Cube (n³)
- 2,893,640,625
- Divisor count
- 12
- σ(n) — sum of divisors
- 2,480
- φ(n) — Euler's totient
- 720
- Sum of prime factors
- 32
Primality
Prime factorization: 3 × 5 2 × 19
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand four hundred twenty-five
- Ordinal
- 1425th
- Roman numeral
- MCDXXV
- Binary
- 10110010001
- Octal
- 2621
- Hexadecimal
- 0x591
- Base64
- BZE=
- One's complement
- 64,110 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αυκεʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋥
- Chinese
- 一千四百二十五
- Chinese (financial)
- 壹仟肆佰貳拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,425 = 4
- e — Euler's number (e)
- Digit 1,425 = 6
- φ — Golden ratio (φ)
- Digit 1,425 = 3
- √2 — Pythagoras's (√2)
- Digit 1,425 = 9
- ln 2 — Natural log of 2
- Digit 1,425 = 3
- γ — Euler-Mascheroni (γ)
- Digit 1,425 = 0
Also seen as
UTF-8 encoding: D6 91 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.145.
- Address
- 0.0.5.145
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.145
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1425 first appears in π at position 4,583 of the decimal expansion (the 4,583ordinal-suffix:rd 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.