Number

625

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

Automorphic Number Deficient Number Odious Number Perfect Square Pernicious Number Powerful Number Recamán's Sequence Year

Historical context — 625 AD

Calendar year

Year 625 (DCXXV) was a common year starting on Tuesday of the Julian calendar.

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Historical context — 625 BC

Calendar year

The year 625 BC was a year of the pre-Julian Roman 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, 625
Ended on: Saturday
December 31, 625
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 620s
620–629
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,401
1401 years before 2026.

In other calendars

Hebrew: 4385 / 4386 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 3 / 4 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Rooster
Sexagenary cycle position 22 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1168 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 3 / 4 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 617 / 618 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 547 / 546 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 13
Digit product: 60
Digital root: 4
Palindrome: No
Bit width: 10 bits
Reversed: 526
Recamán's sequence: a(8,890) = 625
Square (n²): 390,625
Cube (n³): 244,140,625
Square root (√n): 25
Divisor count: 5
σ(n) — sum of divisors: 781
φ(n) — Euler's totient: 500
Sum of prime factors: 20

Primality

Prime factorization: 5 ⁴

Nearest primes: 619 (−6) · 631 (+6)

Divisors & multiples

All divisors (5)

1 · 5 · 25 · 125 · 625

Aliquot sum (sum of proper divisors): 156

Factor pairs (a × b = 625)

1 × 625

5 × 125

25 × 25

First multiples

625 · 1,250 (double) · 1,875 · 2,500 · 3,125 · 3,750 · 4,375 · 5,000 · 5,625 · 6,250

Sums & aliquot sequence

As a sum of two squares: 0² + 25² = 7² + 24² = 15² + 20²

As consecutive integers: 312 + 313 123 + 124 + 125 + 126 + 127 58 + 59 + … + 67 13 + 14 + … + 37

Aliquot sequence: 625 → 156 → 236 → 184 → 176 → 196 → 203 → 37 → 1 → 0 — terminates at zero

Representations

In words: six hundred twenty-five
Ordinal: 625th
Roman numeral: DCXXV
Binary: 1001110001
Octal: 1161
Hexadecimal: 0x271
Base64: AnE=
One's complement: 64,910 (16-bit)

In other bases

ternary (3) 212011

quaternary (4) 21301

quinary (5) 10000

senary (6) 2521

septenary (7) 1552

nonary (9) 764

undecimal (11) 519

duodecimal (12) 441

tridecimal (13) 391

tetradecimal (14) 329

pentadecimal (15) 2ba

Historical numeral systems

Babylonian (base 60): 𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): χκεʹ
Mayan (base 20): 𝋡·𝋫·𝋥
Chinese: 六百二十五
Chinese (financial): 陸佰貳拾伍

In other modern scripts

Eastern Arabic ٦٢٥ Devanagari ६२५ Bengali ৬২৫ Tamil ௬௨௫ Thai ๖๒๕ Tibetan ༦༢༥ Khmer ៦២៥ Lao ໖໒໕ Burmese ၆၂၅

Digit at this position in famous constants

π — Pi (π): Digit 625 = 5
e — Euler's number (e): Digit 625 = 9
φ — Golden ratio (φ): Digit 625 = 6
√2 — Pythagoras's (√2): Digit 625 = 8
ln 2 — Natural log of 2: Digit 625 = 7
γ — Euler-Mascheroni (γ): Digit 625 = 0

Also seen as

Unicode codepoint

Latin Small Letter M With Hook

U+0271

Lowercase letter (Ll)

UTF-8 encoding: C9 B1 (2 bytes).

Lookup U+0271 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000271

RGB(0, 2, 113)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.113.

Address: 0.0.2.113
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.113

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