130,021
130,021 is a prime, odd.
130,021 (one hundred thirty thousand twenty-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1FBE5.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 7
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 120,031
- Recamán's sequence
- a(33,798) = 130,021
- Square (n²)
- 16,905,460,441
- Cube (n³)
- 2,198,064,871,999,261
- Divisor count
- 2
- σ(n) — sum of divisors
- 130,022
- φ(n) — Euler's totient
- 130,020
Primality
130,021 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√130,021 = [360; (1, 1, 2, 2, 7, 5, 1, 2, 1, 2, 7, 2, 9, 47, 1, 35, 12, 1, 1, 1, 1, 1, 21, 4, …)]
Representations
- In words
- one hundred thirty thousand twenty-one
- Ordinal
- 130021st
- Binary
- 11111101111100101
- Octal
- 375745
- Hexadecimal
- 0x1FBE5
- Base64
- Afvl
- One's complement
- 4,294,837,274 (32-bit)
- Scientific notation
- 1.30021 × 10⁵
- As a duration
- 130,021 s = 1 day, 12 hours, 7 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλκαʹ
- Mayan (base 20)
- 𝋰·𝋥·𝋡·𝋡
- Chinese
- 一十三萬零二十一
- Chinese (financial)
- 壹拾參萬零貳拾壹
Also seen as
UTF-8 encoding: F0 9F AF A5 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.251.229.
- Address
- 0.1.251.229
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.251.229
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 130,021 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 130021 first appears in π at position 122,234 of the decimal expansion (the 122,234ordinal-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.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.