Live analysis

10,421

10,421 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.).

10,421 (ten thousand four hundred twenty-one) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 17 × 613. Written other ways, in hexadecimal, 0x28B5.

Arithmetic Number Cube-Free Deficient Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

10,409 10,410 10,411 10,412 10,413 10,414 10,415 10,416 10,417 10,418 10,419 10,420 10,421 10,422 10,423 10,424 10,425 10,426 10,427 10,428 10,429 10,430 10,431 10,432 10,433

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 8
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 14 bits
Reversed: 12,401
Recamán's sequence: a(50,677) = 10,421
Square (n²): 108,597,241
Cube (n³): 1,131,691,848,461
Divisor count: 4
σ(n) — sum of divisors: 11,052
φ(n) — Euler's totient: 9,792
Sum of prime factors: 630

Primality

Prime factorization: 17 × 613

Nearest primes: 10,399 (−22) · 10,427 (+6)

Divisors & multiples

All divisors (4)

1 · 17 · 613 · 10421

Aliquot sum (sum of proper divisors): 631

Factor pairs (a × b = 10,421)

1 × 10421

17 × 613

First multiples

10,421 · 20,842 (double) · 31,263 · 41,684 · 52,105 · 62,526 · 72,947 · 83,368 · 93,789 · 104,210

Sums & aliquot sequence

As a sum of two squares: 50² + 89² = 55² + 86²

As consecutive integers: 5,210 + 5,211 605 + 606 + … + 621 290 + 291 + … + 323

Aliquot sequence: 10,421 → 631 → 1 → 0 — terminates at zero

Continued fraction of √n

√10,421 = [102; (12, 204)]

Period length 2 — the block in parentheses repeats forever.

Representations

In words: ten thousand four hundred twenty-one
Ordinal: 10421st
Binary: 10100010110101
Octal: 24265
Hexadecimal: 0x28B5
Base64: KLU=
One's complement: 55,114 (16-bit)
Scientific notation: 1.0421 × 10⁴
As a duration: 10,421 s = 2 hours, 53 minutes, 41 seconds

In other bases

ternary (3) 112021222

quaternary (4) 2202311

quinary (5) 313141

senary (6) 120125

septenary (7) 42245

nonary (9) 15258

undecimal (11) 7914

duodecimal (12) 6045

tridecimal (13) 4988

tetradecimal (14) 3b25

pentadecimal (15) 314b

As an angle

10,421° = 28 × 360° + 341°

341° ≈ 5.952 rad

Compass bearing: NNW (north-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓍢𓍢𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵ιυκαʹ
Mayan (base 20): 𝋡·𝋦·𝋡·𝋡
Chinese: 一萬零四百二十一
Chinese (financial): 壹萬零肆佰貳拾壹

In other modern scripts

Eastern Arabic ١٠٤٢١ Devanagari १०४२१ Bengali ১০৪২১ Tamil ௧௦௪௨௧ Thai ๑๐๔๒๑ Tibetan ༡༠༤༢༡ Khmer ១០៤២១ Lao ໑໐໔໒໑ Burmese ၁၀၄၂၁

Digit at this position in famous constants

π — Pi (π): Digit 10,421 = 0
e — Euler's number (e): Digit 10,421 = 3
φ — Golden ratio (φ): Digit 10,421 = 2
√2 — Pythagoras's (√2): Digit 10,421 = 9
ln 2 — Natural log of 2: Digit 10,421 = 3
γ — Euler-Mascheroni (γ): Digit 10,421 = 1

Also seen as

Unicode codepoint

⢵

Braille Pattern Dots-13568

U+28B5

Other symbol (So)

UTF-8 encoding: E2 A2 B5 (3 bytes).

Lookup U+28B5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0028B5

RGB(0, 40, 181)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.40.181.

Address: 0.0.40.181
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.40.181

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

Musical pitch

Heard as a frequency, 10,421 Hz is closest to:

Concert pitch (A4 = 440 Hz): E9 (10548.1 Hz, -21¢)
Scientific pitch (C4 = 256 Hz): E9 (10321.3 Hz, +17¢)
Baroque pitch (A4 = 415 Hz): F9 (10540.3 Hz, -20¢)

Position in π

The digit sequence 10421 first appears in π at position 127,703 of the decimal expansion (the 127,703ordinal-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.

Look up 10421 on Pi Search ↗