Live analysis

139,242

139,242 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

139,242 (one hundred thirty-nine thousand two hundred forty-two) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 23 × 1,009. Its proper divisors sum to 151,638, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21FEA.

Abundant Number Arithmetic Number Cube-Free Odious Number Pernicious Number Recamán's Sequence Semiperfect Number Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

139,230 139,231 139,232 139,233 139,234 139,235 139,236 139,237 139,238 139,239 139,240 139,241 139,242 139,243 139,244 139,245 139,246 139,247 139,248 139,249 139,250 139,251 139,252 139,253 139,254

less more

Properties

Parity: Even
Digit count: 6
Digit sum: 21
Digit product: 432
Digital root: 3
Palindrome: No
Bit width: 18 bits
Reversed: 242,931
Recamán's sequence: a(490,343) = 139,242
Square (n²): 19,388,334,564
Cube (n³): 2,699,670,481,360,488
Divisor count: 16
σ(n) — sum of divisors: 290,880
φ(n) — Euler's totient: 44,352
Sum of prime factors: 1,037

Primality

Prime factorization: 2 × 3 × 23 × 1009

Nearest primes: 139,241 (−1) · 139,267 (+25)

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 6 · 23 · 46 · 69 · 138 · 1009 · 2018 · 3027 · 6054 · 23207 · 46414 · 69621 (half) · 139242

Aliquot sum (sum of proper divisors): 151,638

Factor pairs (a × b = 139,242)

1 × 139242

2 × 69621

3 × 46414

6 × 23207

23 × 6054

46 × 3027

69 × 2018

138 × 1009

First multiples

139,242 · 278,484 (double) · 417,726 · 556,968 · 696,210 · 835,452 · 974,694 · 1,113,936 · 1,253,178 · 1,392,420

Sums & aliquot sequence

As consecutive integers: 46,413 + 46,414 + 46,415 34,809 + 34,810 + 34,811 + 34,812 11,598 + 11,599 + … + 11,609 6,043 + 6,044 + … + 6,065

Aliquot sequence: 139,242 → 151,638 → 155,562 → 183,990 → 257,658 → 257,670 → 509,850 → 998,982 → 1,397,178 → 1,630,080 → 4,018,680 → 9,600,120 → 22,677,840 → 55,442,160 → 130,753,512 → 228,236,028 → 304,314,732 — unresolved within range

Continued fraction of √n

√139,242 = [373; (6, 1, 1, 1, 1, 12, 3, 1, 4, 1, 4, 2, 1, 1, 4, 1, 5, 1, 9, 4, 3, 5, 1, 1, …)]

Representations

In words: one hundred thirty-nine thousand two hundred forty-two
Ordinal: 139242nd
Binary: 100001111111101010
Octal: 417752
Hexadecimal: 0x21FEA
Base64: Ah/q
One's complement: 4,294,828,053 (32-bit)
Scientific notation: 1.39242 × 10⁵
As a duration: 139,242 s = 1 day, 14 hours, 40 minutes, 42 seconds

In other bases

ternary (3) 21002000010

quaternary (4) 201333222

quinary (5) 13423432

senary (6) 2552350

septenary (7) 1116645

nonary (9) 232003

undecimal (11) 95684

duodecimal (12) 686b6

tridecimal (13) 4b4bc

tetradecimal (14) 38a5c

pentadecimal (15) 2b3cc

As an angle

139,242° = 386 × 360° + 282°

282° ≈ 4.922 rad

Compass bearing: WNW (west-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹
Egyptian hieroglyphic: 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
Greek (Milesian): ͵ρλθσμβʹ
Mayan (base 20): 𝋱·𝋨·𝋢·𝋢
Chinese: 一十三萬九千二百四十二
Chinese (financial): 壹拾參萬玖仟貳佰肆拾貳

In other modern scripts

Eastern Arabic ١٣٩٢٤٢ Devanagari १३९२४२ Bengali ১৩৯২৪২ Tamil ௧௩௯௨௪௨ Thai ๑๓๙๒๔๒ Tibetan ༡༣༩༢༤༢ Khmer ១៣៩២៤២ Lao ໑໓໙໒໔໒ Burmese ၁၃၉၂၄၂

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139242, here are decompositions:

41 + 139201 = 139242
43 + 139199 = 139242
73 + 139169 = 139242
109 + 139133 = 139242
151 + 139091 = 139242
163 + 139079 = 139242
283 + 138959 = 139242
349 + 138893 = 139242

Showing the first eight; more decompositions exist.

Unicode codepoint

𡿪

CJK Unified Ideograph-21Fea

U+21FEA

Other letter (Lo)

UTF-8 encoding: F0 A1 BF AA (4 bytes).

Lookup U+21FEA on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#021FEA

RGB(2, 31, 234)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.2.31.234.

Address: 0.2.31.234
Class: reserved
IPv4-mapped IPv6: ::ffff:0.2.31.234

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Possible US patent number

This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 139,242 and was likely granted around 1872.

Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.

Look up US139,242 on Google Patents ↗ Look up on USPTO ↗