Live analysis

8,421

8,421 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.).

Arithmetic Number Deficient Number Descending Digits Evil Number Recamán's Sequence Self Number Smith Number Sphenic Number Squarefree

Properties

Parity: Odd
Digit count: 4
Digit sum: 15
Digit product: 64
Digital root: 6
Palindrome: No
Bit width: 14 bits
Reversed: 1,248
Recamán's sequence: a(2,889) = 8,421
Square (n²): 70,913,241
Cube (n³): 597,160,402,461
Divisor count: 8
σ(n) — sum of divisors: 12,864
φ(n) — Euler's totient: 4,800
Sum of prime factors: 411

Primality

Prime factorization: 3 × 7 × 401

Nearest primes: 8,419 (−2) · 8,423 (+2)

Divisors & multiples

All divisors (8)

1 · 3 · 7 · 21 · 401 · 1203 · 2807 · 8421

Aliquot sum (sum of proper divisors): 4,443

Factor pairs (a × b = 8,421)

1 × 8421

3 × 2807

7 × 1203

21 × 401

First multiples

8,421 · 16,842 (double) · 25,263 · 33,684 · 42,105 · 50,526 · 58,947 · 67,368 · 75,789 · 84,210

Sums & aliquot sequence

As consecutive integers: 4,210 + 4,211 2,806 + 2,807 + 2,808 1,401 + 1,402 + 1,403 + 1,404 + 1,405 + 1,406 1,200 + 1,201 + … + 1,206

Aliquot sequence: 8,421 → 4,443 → 1,485 → 1,395 → 1,101 → 371 → 61 → 1 → 0 — terminates at zero

Representations

In words: eight thousand four hundred twenty-one
Ordinal: 8421st
Binary: 10000011100101
Octal: 20345
Hexadecimal: 0x20E5
Base64: IOU=
One's complement: 57,114 (16-bit)

In other bases

ternary (3) 102112220

quaternary (4) 2003211

quinary (5) 232141

senary (6) 102553

septenary (7) 33360

nonary (9) 12486

undecimal (11) 6366

duodecimal (12) 4a59

tridecimal (13) 3aaa

tetradecimal (14) 30d7

pentadecimal (15) 2766

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋 𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵ηυκαʹ
Mayan (base 20): 𝋡·𝋡·𝋡·𝋡
Chinese: 八千四百二十一
Chinese (financial): 捌仟肆佰貳拾壹

In other modern scripts

Eastern Arabic ٨٤٢١ Devanagari ८४२१ Bengali ৮৪২১ Tamil ௮௪௨௧ Thai ๘๔๒๑ Tibetan ༨༤༢༡ Khmer ៨៤២១ Lao ໘໔໒໑ Burmese ၈၄၂၁

Digit at this position in famous constants

π — Pi (π): Digit 8,421 = 0
e — Euler's number (e): Digit 8,421 = 7
φ — Golden ratio (φ): Digit 8,421 = 8
√2 — Pythagoras's (√2): Digit 8,421 = 8
ln 2 — Natural log of 2: Digit 8,421 = 7
γ — Euler-Mascheroni (γ): Digit 8,421 = 6

Also seen as

Unicode codepoint

⃥

Combining Reverse Solidus Overlay

U+20E5

Non-spacing mark (Mn)

UTF-8 encoding: E2 83 A5 (3 bytes).

Lookup U+20E5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0020E5

RGB(0, 32, 229)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.32.229.

Address: 0.0.32.229
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.32.229

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

Position in π

The digit sequence 8421 first appears in π at position 17,313 of the decimal expansion (the 17,313ordinal-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 8421 on Pi Search ↗