Live analysis
21,421
21,421 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.).
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 16
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 12,412
- Recamán's sequence
- a(40,997) = 21,421
- Square (n²)
- 458,859,241
- Cube (n³)
- 9,829,223,801,461
- Divisor count
- 4
- σ(n) — sum of divisors
- 22,144
- φ(n) — Euler's totient
- 20,700
- Sum of prime factors
- 722
Primality
Prime factorization: 31 × 691
Divisors & multiples
Aliquot sum (sum of proper divisors):
723
First multiples
21,421
·
42,842
(double)
·
64,263
·
85,684
·
107,105
·
128,526
·
149,947
·
171,368
·
192,789
·
214,210
Sums & aliquot sequence
As consecutive integers:
10,710 + 10,711
676 + 677 + … + 706
315 + 316 + … + 376
Aliquot sequence:
21,421 → 723 → 245 → 97 → 1 → 0
— terminates at zero
Representations
- In words
- twenty-one thousand four hundred twenty-one
- Ordinal
- 21421st
- Binary
- 101001110101101
- Octal
- 51655
- Hexadecimal
- 0x53AD
- Base64
- U60=
- One's complement
- 44,114 (16-bit)
In other bases
ternary (3)
1002101101
quaternary (4)
11032231
quinary (5)
1141141
senary (6)
243101
septenary (7)
116311
nonary (9)
32341
undecimal (11)
15104
duodecimal (12)
10491
tridecimal (13)
999a
tetradecimal (14)
7b41
pentadecimal (15)
6531
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵καυκαʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋫·𝋡
- Chinese
- 二萬一千四百二十一
- Chinese (financial)
- 貳萬壹仟肆佰貳拾壹
In other modern scripts
Eastern Arabic
٢١٤٢١
Devanagari
२१४२१
Bengali
২১৪২১
Tamil
௨௧௪௨௧
Thai
๒๑๔๒๑
Tibetan
༢༡༤༢༡
Khmer
២១៤២១
Lao
໒໑໔໒໑
Burmese
၂၁၄၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,421 = 3
- e — Euler's number (e)
- Digit 21,421 = 7
- φ — Golden ratio (φ)
- Digit 21,421 = 0
- √2 — Pythagoras's (√2)
- Digit 21,421 = 8
- ln 2 — Natural log of 2
- Digit 21,421 = 1
- γ — Euler-Mascheroni (γ)
- Digit 21,421 = 0
Also seen as
Unicode codepoint
厭
CJK Unified Ideograph-53Ad
U+53AD
Other letter (Lo)
UTF-8 encoding: E5 8E AD (3 bytes).
Hex color
#0053AD
RGB(0, 83, 173)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.173.
- Address
- 0.0.83.173
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.173
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 21421 first appears in π at position 319,055 of the decimal expansion (the 319,055ordinal-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.