Number

1,625

1,625 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Evil Number Recamán's Sequence Year

Notable events — 1625 AD

Mar 27 James I of England dies; Charles I succeeds him.
Apr 24 Dutch settlers buy Manhattan from local indigenous people (often dated 1626).
Jul 9 Hugo Grotius publishes The Rights of War and Peace.

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: Wednesday
January 1, 1625
Ended on: Wednesday
December 31, 1625
Friday the 13ths: 1
One Friday the 13th this year.
Easter Sunday: March 30
Sunday, March 30, 1625
Decade: 1620s
1620–1629
Century: 17th century
1601–1700
Millennium: 2nd millennium
1001–2000
Years ago: 401
401 years before 2026.

In other calendars

Hebrew: 5385 / 5386 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1034 / 1035 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: 2168 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 1003 / 1004 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1617 / 1618 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1547 / 1546 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 14
Digit product: 60
Digital root: 5
Palindrome: No
Bit width: 11 bits
Reversed: 5,261
Recamán's sequence: a(702) = 1,625
Square (n²): 2,640,625
Cube (n³): 4,291,015,625
Divisor count: 8
σ(n) — sum of divisors: 2,184
φ(n) — Euler's totient: 1,200
Sum of prime factors: 28

Primality

Prime factorization: 5 ³ × 13

Nearest primes: 1,621 (−4) · 1,627 (+2)

Divisors & multiples

All divisors (8)

1 · 5 · 13 · 25 · 65 · 125 · 325 · 1625

Aliquot sum (sum of proper divisors): 559

Factor pairs (a × b = 1,625)

1 × 1625

5 × 325

13 × 125

25 × 65

First multiples

1,625 · 3,250 (double) · 4,875 · 6,500 · 8,125 · 9,750 · 11,375 · 13,000 · 14,625 · 16,250

Sums & aliquot sequence

As a sum of two squares: 5² + 40² = 16² + 37² = 20² + 35² = 28² + 29²

As consecutive integers: 812 + 813 323 + 324 + 325 + 326 + 327 158 + 159 + … + 167 119 + 120 + … + 131

Aliquot sequence: 1,625 → 559 → 57 → 23 → 1 → 0 — terminates at zero

Representations

In words: one thousand six hundred twenty-five
Ordinal: 1625th
Roman numeral: MDCXXV
Binary: 11001011001
Octal: 3131
Hexadecimal: 0x659
Base64: Blk=
One's complement: 63,910 (16-bit)

In other bases

ternary (3) 2020012

quaternary (4) 121121

quinary (5) 23000

senary (6) 11305

septenary (7) 4511

nonary (9) 2205

undecimal (11) 1248

duodecimal (12) b35

tridecimal (13) 980

tetradecimal (14) 841

pentadecimal (15) 735

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵αχκεʹ
Mayan (base 20): 𝋤·𝋡·𝋥
Chinese: 一千六百二十五
Chinese (financial): 壹仟陸佰貳拾伍

In other modern scripts

Eastern Arabic ١٦٢٥ Devanagari १६२५ Bengali ১৬২৫ Tamil ௧௬௨௫ Thai ๑๖๒๕ Tibetan ༡༦༢༥ Khmer ១៦២៥ Lao ໑໖໒໕ Burmese ၁၆၂၅

Digit at this position in famous constants

π — Pi (π): Digit 1,625 = 2
e — Euler's number (e): Digit 1,625 = 0
φ — Golden ratio (φ): Digit 1,625 = 2
√2 — Pythagoras's (√2): Digit 1,625 = 8
ln 2 — Natural log of 2: Digit 1,625 = 0
γ — Euler-Mascheroni (γ): Digit 1,625 = 0

Also seen as

Unicode codepoint

Arabic Zwarakay

U+0659

Non-spacing mark (Mn)

UTF-8 encoding: D9 99 (2 bytes).

Lookup U+0659 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000659

RGB(0, 6, 89)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.89.

Address: 0.0.6.89
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.6.89

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Position in π

The digit sequence 1625 first appears in π at position 8,815 of the decimal expansion (the 8,815ordinal-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.

Look up 1625 on Pi Search ↗