139,221
139,221 is a composite number, odd.
139,221 (one hundred thirty-nine thousand two hundred twenty-one) is an odd 6-digit number. It is a composite number with 12 divisors, and factors as 3² × 31 × 499. Written other ways, in hexadecimal, 0x21FD5.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 108
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 122,931
- Recamán's sequence
- a(490,385) = 139,221
- Square (n²)
- 19,382,486,841
- Cube (n³)
- 2,698,449,200,490,861
- Divisor count
- 12
- σ(n) — sum of divisors
- 208,000
- φ(n) — Euler's totient
- 89,640
- Sum of prime factors
- 536
Primality
Prime factorization: 3 2 × 31 × 499
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,221 = [373; (8, 9, 11, 2, 1, 2, 3, 1, 1, 1, 16, 3, 8, 1, 1, 1, 43, 4, 8, 7, 2, 1, 13, 2, …)]
Period length 56 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand two hundred twenty-one
- Ordinal
- 139221st
- Binary
- 100001111111010101
- Octal
- 417725
- Hexadecimal
- 0x21FD5
- Base64
- Ah/V
- One's complement
- 4,294,828,074 (32-bit)
- Scientific notation
- 1.39221 × 10⁵
- As a duration
- 139,221 s = 1 day, 14 hours, 40 minutes, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλθσκαʹ
- Mayan (base 20)
- 𝋱·𝋨·𝋡·𝋡
- Chinese
- 一十三萬九千二百二十一
- Chinese (financial)
- 壹拾參萬玖仟貳佰貳拾壹
Also seen as
UTF-8 encoding: F0 A1 BF 95 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.31.213.
- Address
- 0.2.31.213
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.31.213
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 139,221 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 139221 first appears in π at position 703,872 of the decimal expansion (the 703,872ordinal-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.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.