Number
87,121
87,121 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 19
- Digit product
- 112
- Digital root
- 1
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 12,178
- Square (n²)
- 7,590,068,641
- Cube (n³)
- 661,254,370,072,561
- Divisor count
- 2
- σ(n) — sum of divisors
- 87,122
- φ(n) — Euler's totient
- 87,120
Primality
87,121 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
87,121
·
174,242
(double)
·
261,363
·
348,484
·
435,605
·
522,726
·
609,847
·
696,968
·
784,089
·
871,210
Sums & aliquot sequence
As a sum of two squares:
60² + 289²
As consecutive integers:
43,560 + 43,561
Representations
- In words
- eighty-seven thousand one hundred twenty-one
- Ordinal
- 87121st
- Binary
- 10101010001010001
- Octal
- 252121
- Hexadecimal
- 0x15451
- Base64
- AVRR
- One's complement
- 4,294,880,174 (32-bit)
In other bases
ternary (3)
11102111201
quaternary (4)
111101101
quinary (5)
10241441
senary (6)
1511201
septenary (7)
511666
nonary (9)
142451
undecimal (11)
5a501
duodecimal (12)
42501
tridecimal (13)
30868
tetradecimal (14)
23a6d
pentadecimal (15)
1ac31
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵πζρκαʹ
- Mayan (base 20)
- 𝋪·𝋱·𝋰·𝋡
- Chinese
- 八萬七千一百二十一
- Chinese (financial)
- 捌萬柒仟壹佰貳拾壹
In other modern scripts
Eastern Arabic
٨٧١٢١
Devanagari
८७१२१
Bengali
৮৭১২১
Tamil
௮௭௧௨௧
Thai
๘๗๑๒๑
Tibetan
༨༧༡༢༡
Khmer
៨៧១២១
Lao
໘໗໑໒໑
Burmese
၈၇၁၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 87,121 = 6
- e — Euler's number (e)
- Digit 87,121 = 1
- φ — Golden ratio (φ)
- Digit 87,121 = 1
- √2 — Pythagoras's (√2)
- Digit 87,121 = 7
- ln 2 — Natural log of 2
- Digit 87,121 = 1
- γ — Euler-Mascheroni (γ)
- Digit 87,121 = 3
Also seen as
Prime neighborhood
Hex color
#015451
RGB(1, 84, 81)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.1.84.81.
- Address
- 0.1.84.81
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.84.81
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 87121 first appears in π at position 63,915 of the decimal expansion (the 63,915ordinal-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.