125,221
125,221 is a prime, odd.
125,221 (one hundred twenty-five thousand two hundred twenty-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1E925.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 40
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 122,521
- Recamán's sequence
- a(235,722) = 125,221
- Square (n²)
- 15,680,298,841
- Cube (n³)
- 1,963,502,701,168,861
- Divisor count
- 2
- σ(n) — sum of divisors
- 125,222
- φ(n) — Euler's totient
- 125,220
Primality
125,221 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√125,221 = [353; (1, 6, 2, 4, 1, 1, 1, 1, 1, 235, 3, 2, 6, 1, 1, 1, 5, 1, 1, 78, 10, 2, 1, 1, …)]
Representations
- In words
- one hundred twenty-five thousand two hundred twenty-one
- Ordinal
- 125221st
- Binary
- 11110100100100101
- Octal
- 364445
- Hexadecimal
- 0x1E925
- Base64
- Aekl
- One's complement
- 4,294,842,074 (32-bit)
- Scientific notation
- 1.25221 × 10⁵
- As a duration
- 125,221 s = 1 day, 10 hours, 47 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρκεσκαʹ
- Mayan (base 20)
- 𝋯·𝋭·𝋡·𝋡
- Chinese
- 一十二萬五千二百二十一
- Chinese (financial)
- 壹拾貳萬伍仟貳佰貳拾壹
Also seen as
UTF-8 encoding: F0 9E A4 A5 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.233.37.
- Address
- 0.1.233.37
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.233.37
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 125,221 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
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.