138,242
138,242 is a composite number, even.
138,242 (one hundred thirty-eight thousand two hundred forty-two) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2 × 13² × 409. Written other ways, in hexadecimal, 0x21C02.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 384
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 242,831
- Recamán's sequence
- a(492,343) = 138,242
- Square (n²)
- 19,110,850,564
- Cube (n³)
- 2,641,922,203,668,488
- Divisor count
- 12
- σ(n) — sum of divisors
- 225,090
- φ(n) — Euler's totient
- 63,648
- Sum of prime factors
- 437
Primality
Prime factorization: 2 × 13 2 × 409
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,242 = [371; (1, 4, 4, 4, 1, 742)]
Period length 6 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand two hundred forty-two
- Ordinal
- 138242nd
- Binary
- 100001110000000010
- Octal
- 416002
- Hexadecimal
- 0x21C02
- Base64
- AhwC
- One's complement
- 4,294,829,053 (32-bit)
- Scientific notation
- 1.38242 × 10⁵
- As a duration
- 138,242 s = 1 day, 14 hours, 24 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλησμβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋬·𝋢
- Chinese
- 一十三萬八千二百四十二
- Chinese (financial)
- 壹拾參萬捌仟貳佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138242, here are decompositions:
- 3 + 138239 = 138242
- 61 + 138181 = 138242
- 79 + 138163 = 138242
- 103 + 138139 = 138242
- 163 + 138079 = 138242
- 331 + 137911 = 138242
- 373 + 137869 = 138242
- 439 + 137803 = 138242
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B0 82 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.2.
- Address
- 0.2.28.2
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.2
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 138,242 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138242 first appears in π at position 288,669 of the decimal expansion (the 288,669ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.