Number
13,921
13,921 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 54
- Digital root
- 7
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 12,931
- Recamán's sequence
- a(20,874) = 13,921
- Square (n²)
- 193,794,241
- Cube (n³)
- 2,697,809,628,961
- Divisor count
- 2
- σ(n) — sum of divisors
- 13,922
- φ(n) — Euler's totient
- 13,920
Primality
13,921 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Sums & aliquot sequence
As a sum of two squares:
40² + 111²
As consecutive integers:
6,960 + 6,961
Representations
- In words
- thirteen thousand nine hundred twenty-one
- Ordinal
- 13921st
- Binary
- 11011001100001
- Octal
- 33141
- Hexadecimal
- 0x3661
- Base64
- NmE=
- One's complement
- 51,614 (16-bit)
In other bases
ternary (3)
201002121
quaternary (4)
3121201
quinary (5)
421141
senary (6)
144241
septenary (7)
55405
nonary (9)
21077
undecimal (11)
a506
duodecimal (12)
8081
tridecimal (13)
644b
tetradecimal (14)
5105
pentadecimal (15)
41d1
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ιγϡκαʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋰·𝋡
- Chinese
- 一萬三千九百二十一
- Chinese (financial)
- 壹萬參仟玖佰貳拾壹
In other modern scripts
Eastern Arabic
١٣٩٢١
Devanagari
१३९२१
Bengali
১৩৯২১
Tamil
௧௩௯௨௧
Thai
๑๓๙๒๑
Tibetan
༡༣༩༢༡
Khmer
១៣៩២១
Lao
໑໓໙໒໑
Burmese
၁၃၉၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,921 = 6
- e — Euler's number (e)
- Digit 13,921 = 5
- φ — Golden ratio (φ)
- Digit 13,921 = 4
- √2 — Pythagoras's (√2)
- Digit 13,921 = 7
- ln 2 — Natural log of 2
- Digit 13,921 = 6
- γ — Euler-Mascheroni (γ)
- Digit 13,921 = 4
Also seen as
Unicode codepoint
㙡
CJK Unified Ideograph-3661
U+3661
Other letter (Lo)
UTF-8 encoding: E3 99 A1 (3 bytes).
Hex color
#003661
RGB(0, 54, 97)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.54.97.
- Address
- 0.0.54.97
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.54.97
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 13921 first appears in π at position 12,194 of the decimal expansion (the 12,194ordinal-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.