Number

457

457 is a prime, odd, a calendar year.

Arithmetic Number Ascending Digits Cousin Prime Deficient Number Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Self Number Sexy Prime Squarefree Year

Historical context — 457 AD

Calendar year

Year 457 (CDLVII) was a common year starting on Tuesday of the Julian calendar.

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Historical context — 457 BC

Calendar year

Year 457 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: Monday
January 1, 457
Ended on: Monday
December 31, 457
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 450s
450–459
Century: 5th century
401–500
Millennium: 1st millennium
1–1000
Years ago: 1,569
1569 years before 2026.

In other calendars

Hebrew: 4217 / 4218 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Fire zodiac:Rooster
Sexagenary cycle position 34 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1000 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 449 / 450 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 379 / 378 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 16
Digit product: 140
Digital root: 7
Palindrome: No
Bit width: 9 bits
Reversed: 754
Recamán's sequence: a(174) = 457
Square (n²): 208,849
Cube (n³): 95,443,993
Divisor count: 2
σ(n) — sum of divisors: 458
φ(n) — Euler's totient: 456

Primality

457 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 457

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 457)

1 × 457

First multiples

457 · 914 (double) · 1,371 · 1,828 · 2,285 · 2,742 · 3,199 · 3,656 · 4,113 · 4,570

Sums & aliquot sequence

As a sum of two squares: 4² + 21²

As consecutive integers: 228 + 229

Representations

In words: four hundred fifty-seven
Ordinal: 457th
Roman numeral: CDLVII
Binary: 111001001
Octal: 711
Hexadecimal: 0x1C9
Base64: Ack=
One's complement: 65,078 (16-bit)

In other bases

ternary (3) 121221

quaternary (4) 13021

quinary (5) 3312

senary (6) 2041

septenary (7) 1222

nonary (9) 557

undecimal (11) 386

duodecimal (12) 321

tridecimal (13) 292

tetradecimal (14) 249

pentadecimal (15) 207

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): υνζʹ
Mayan (base 20): 𝋡·𝋢·𝋱
Chinese: 四百五十七
Chinese (financial): 肆佰伍拾柒

In other modern scripts

Eastern Arabic ٤٥٧ Devanagari ४५७ Bengali ৪৫৭ Tamil ௪௫௭ Thai ๔๕๗ Tibetan ༤༥༧ Khmer ៤៥៧ Lao ໔໕໗ Burmese ၄၅၇

Digit at this position in famous constants

π — Pi (π): Digit 457 = 2
e — Euler's number (e): Digit 457 = 5
φ — Golden ratio (φ): Digit 457 = 1
√2 — Pythagoras's (√2): Digit 457 = 8
ln 2 — Natural log of 2: Digit 457 = 5
γ — Euler-Mascheroni (γ): Digit 457 = 4

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 449 (gap of 8)
Next prime: 461 (gap of 4)

Pair status: cousin with 461.

Unicode codepoint

Latin Small Letter Lj

U+01C9

Lowercase letter (Ll)

UTF-8 encoding: C7 89 (2 bytes).

Lookup U+01C9 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001C9

RGB(0, 1, 201)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.201.

Address: 0.0.1.201
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.201

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