Live analysis

21,429

21,429 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

21,429 (twenty-one thousand four hundred twenty-nine) is an odd 5-digit number. It is a composite number with 6 divisors, and factors as 3² × 2,381. Written other ways, in hexadecimal, 0x53B5.

Arithmetic Number Cube-Free Deficient Number Odious Number Recamán's Sequence

Interestingness

★ ☆ ☆ ☆ ☆

3 notable facts · grade F

21,417 21,418 21,419 21,420 21,421 21,422 21,423 21,424 21,425 21,426 21,427 21,428 21,429 21,430 21,431 21,432 21,433 21,434 21,435 21,436 21,437 21,438 21,439 21,440 21,441

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 18
Digit product: 144
Digital root: 9
Palindrome: No
Bit width: 15 bits
Reversed: 92,412
Recamán's sequence: a(40,981) = 21,429
Square (n²): 459,202,041
Cube (n³): 9,840,240,536,589
Divisor count: 6
σ(n) — sum of divisors: 30,966
φ(n) — Euler's totient: 14,280
Sum of prime factors: 2,387

Primality

Prime factorization: 3 ² × 2381

Nearest primes: 21,419 (−10) · 21,433 (+4)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 2381 · 7143 · 21429

Aliquot sum (sum of proper divisors): 9,537

Factor pairs (a × b = 21,429)

1 × 21429

3 × 7143

9 × 2381

First multiples

21,429 · 42,858 (double) · 64,287 · 85,716 · 107,145 · 128,574 · 150,003 · 171,432 · 192,861 · 214,290

Sums & aliquot sequence

As a sum of two squares: 102² + 105²

As consecutive integers: 10,714 + 10,715 7,142 + 7,143 + 7,144 3,569 + 3,570 + 3,571 + 3,572 + 3,573 + 3,574 2,377 + 2,378 + … + 2,385

Aliquot sequence: 21,429 → 9,537 → 5,199 → 1,737 → 785 → 163 → 1 → 0 — terminates at zero

Continued fraction of √n

√21,429 = [146; (2, 1, 1, 2, 2, 1, 3, 1, 16, 2, 3, 3, 6, 2, 1, 6, 7, 1, 57, 1, 2, 10, 8, 3, …)]

Representations

In words: twenty-one thousand four hundred twenty-nine
Ordinal: 21429th
Binary: 101001110110101
Octal: 51665
Hexadecimal: 0x53B5
Base64: U7U=
One's complement: 44,106 (16-bit)
Scientific notation: 2.1429 × 10⁴
As a duration: 21,429 s = 5 hours, 57 minutes, 9 seconds

In other bases

ternary (3) 1002101200

quaternary (4) 11032311

quinary (5) 1141204

senary (6) 243113

septenary (7) 116322

nonary (9) 32350

undecimal (11) 15111

duodecimal (12) 10499

tridecimal (13) 99a5

tetradecimal (14) 7b49

pentadecimal (15) 6539

As an angle

21,429° = 59 × 360° + 189°

189° ≈ 3.299 rad

Compass bearing: S (south)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵καυκθʹ
Mayan (base 20): 𝋢·𝋭·𝋫·𝋩
Chinese: 二萬一千四百二十九
Chinese (financial): 貳萬壹仟肆佰貳拾玖

In other modern scripts

Eastern Arabic ٢١٤٢٩ Devanagari २१४२९ Bengali ২১৪২৯ Tamil ௨௧௪௨௯ Thai ๒๑๔๒๙ Tibetan ༢༡༤༢༩ Khmer ២១៤២៩ Lao ໒໑໔໒໙ Burmese ၂၁၄၂၉

Digit at this position in famous constants

π — Pi (π): Digit 21,429 = 0
e — Euler's number (e): Digit 21,429 = 4
φ — Golden ratio (φ): Digit 21,429 = 3
√2 — Pythagoras's (√2): Digit 21,429 = 0
ln 2 — Natural log of 2: Digit 21,429 = 7
γ — Euler-Mascheroni (γ): Digit 21,429 = 5

Also seen as

Unicode codepoint

厵

CJK Unified Ideograph-53B5

U+53B5

Other letter (Lo)

UTF-8 encoding: E5 8E B5 (3 bytes).

Lookup U+53B5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0053B5

RGB(0, 83, 181)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.181.

Address: 0.0.83.181
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.83.181

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

Position in π

The digit sequence 21429 first appears in π at position 14,061 of the decimal expansion (the 14,061ordinal-suffix:st 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 21429 on Pi Search ↗