Number
42,491
42,491 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 20
- Digit product
- 288
- Digital root
- 2
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 19,424
- Recamán's sequence
- a(150,641) = 42,491
- Square (n²)
- 1,805,485,081
- Cube (n³)
- 76,716,866,576,771
- Divisor count
- 2
- σ(n) — sum of divisors
- 42,492
- φ(n) — Euler's totient
- 42,490
Primality
42,491 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
42,491
·
84,982
(double)
·
127,473
·
169,964
·
212,455
·
254,946
·
297,437
·
339,928
·
382,419
·
424,910
Sums & aliquot sequence
As consecutive integers:
21,245 + 21,246
Representations
- In words
- forty-two thousand four hundred ninety-one
- Ordinal
- 42491st
- Binary
- 1010010111111011
- Octal
- 122773
- Hexadecimal
- 0xA5FB
- Base64
- pfs=
- One's complement
- 23,044 (16-bit)
In other bases
ternary (3)
2011021202
quaternary (4)
22113323
quinary (5)
2324431
senary (6)
524415
septenary (7)
234611
nonary (9)
64252
undecimal (11)
29a19
duodecimal (12)
2070b
tridecimal (13)
16457
tetradecimal (14)
116b1
pentadecimal (15)
c8cb
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵μβυϟαʹ
- Mayan (base 20)
- 𝋥·𝋦·𝋤·𝋫
- Chinese
- 四萬二千四百九十一
- Chinese (financial)
- 肆萬貳仟肆佰玖拾壹
In other modern scripts
Eastern Arabic
٤٢٤٩١
Devanagari
४२४९१
Bengali
৪২৪৯১
Tamil
௪௨௪௯௧
Thai
๔๒๔๙๑
Tibetan
༤༢༤༩༡
Khmer
៤២៤៩១
Lao
໔໒໔໙໑
Burmese
၄၂၄၉၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,491 = 9
- e — Euler's number (e)
- Digit 42,491 = 8
- φ — Golden ratio (φ)
- Digit 42,491 = 9
- √2 — Pythagoras's (√2)
- Digit 42,491 = 3
- ln 2 — Natural log of 2
- Digit 42,491 = 3
- γ — Euler-Mascheroni (γ)
- Digit 42,491 = 8
Also seen as
Prime neighborhood
Unicode codepoint
ꗻ
Vai Syllable Se
U+A5FB
Other letter (Lo)
UTF-8 encoding: EA 97 BB (3 bytes).
Hex color
#00A5FB
RGB(0, 165, 251)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.165.251.
- Address
- 0.0.165.251
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.165.251
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 42491 first appears in π at position 340,672 of the decimal expansion (the 340,672ordinal-suffix:nd 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.