Number

6,421

6,421 is a prime, odd.

Arithmetic Number Chen Prime Deficient Number Descending Digits Evil Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Squarefree

Properties

Parity: Odd
Digit count: 4
Digit sum: 13
Digit product: 48
Digital root: 4
Palindrome: No
Bit width: 13 bits
Reversed: 1,246
Recamán's sequence: a(27,058) = 6,421
Square (n²): 41,229,241
Cube (n³): 264,732,956,461
Divisor count: 2
σ(n) — sum of divisors: 6,422
φ(n) — Euler's totient: 6,420

Primality

6,421 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 6421

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 6,421)

1 × 6421

First multiples

6,421 · 12,842 (double) · 19,263 · 25,684 · 32,105 · 38,526 · 44,947 · 51,368 · 57,789 · 64,210

Sums & aliquot sequence

As a sum of two squares: 39² + 70²

As consecutive integers: 3,210 + 3,211

Representations

In words: six thousand four hundred twenty-one
Ordinal: 6421st
Binary: 1100100010101
Octal: 14425
Hexadecimal: 0x1915
Base64: GRU=
One's complement: 59,114 (16-bit)

In other bases

ternary (3) 22210211

quaternary (4) 1210111

quinary (5) 201141

senary (6) 45421

septenary (7) 24502

nonary (9) 8724

undecimal (11) 4908

duodecimal (12) 3871

tridecimal (13) 2bcc

tetradecimal (14) 24a9

pentadecimal (15) 1d81

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵ϛυκαʹ
Mayan (base 20): 𝋰·𝋡·𝋡
Chinese: 六千四百二十一
Chinese (financial): 陸仟肆佰貳拾壹

In other modern scripts

Eastern Arabic ٦٤٢١ Devanagari ६४२१ Bengali ৬৪২১ Tamil ௬௪௨௧ Thai ๖๔๒๑ Tibetan ༦༤༢༡ Khmer ៦៤២១ Lao ໖໔໒໑ Burmese ၆၄၂၁

Digit at this position in famous constants

π — Pi (π): Digit 6,421 = 3
e — Euler's number (e): Digit 6,421 = 0
φ — Golden ratio (φ): Digit 6,421 = 7
√2 — Pythagoras's (√2): Digit 6,421 = 9
ln 2 — Natural log of 2: Digit 6,421 = 0
γ — Euler-Mascheroni (γ): Digit 6,421 = 7

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 6,397 (gap of 24)
Next prime: 6,427 (gap of 6)

Pair status: sexy with 6427.

Unicode codepoint

ᤕ

Limbu Letter Ya

U+1915

Other letter (Lo)

UTF-8 encoding: E1 A4 95 (3 bytes).

Lookup U+1915 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#001915

RGB(0, 25, 21)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.25.21.

Address: 0.0.25.21
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.25.21

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

Position in π

The digit sequence 6421 first appears in π at position 7,603 of the decimal expansion (the 7,603ordinal-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 6421 on Pi Search ↗