155,042
155,042 is a composite number, even.
155,042 (one hundred fifty-five thousand forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 77,521. Written other ways, in hexadecimal, 0x25DA2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 240,551
- Recamán's sequence
- a(478,035) = 155,042
- Square (n²)
- 24,038,021,764
- Cube (n³)
- 3,726,902,970,334,088
- Divisor count
- 4
- σ(n) — sum of divisors
- 232,566
- φ(n) — Euler's totient
- 77,520
- Sum of prime factors
- 77,523
Primality
Prime factorization: 2 × 77521
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,042 = [393; (1, 3, 16, 1, 1, 45, 1, 4, 4, 4, 2, 10, 1, 1, 1, 4, 3, 18, 1, 8, 1, 1, 1, 9, …)]
Representations
- In words
- one hundred fifty-five thousand forty-two
- Ordinal
- 155042nd
- Binary
- 100101110110100010
- Octal
- 456642
- Hexadecimal
- 0x25DA2
- Base64
- Al2i
- One's complement
- 4,294,812,253 (32-bit)
- Scientific notation
- 1.55042 × 10⁵
- As a duration
- 155,042 s = 1 day, 19 hours, 4 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρνεμβʹ
- Mayan (base 20)
- 𝋳·𝋧·𝋬·𝋢
- Chinese
- 一十五萬五千零四十二
- Chinese (financial)
- 壹拾伍萬伍仟零肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155042, here are decompositions:
- 61 + 154981 = 155042
- 109 + 154933 = 155042
- 193 + 154849 = 155042
- 373 + 154669 = 155042
- 421 + 154621 = 155042
- 463 + 154579 = 155042
- 499 + 154543 = 155042
- 541 + 154501 = 155042
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 B6 A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.93.162.
- Address
- 0.2.93.162
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.93.162
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 155,042 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 155042 first appears in π at position 383,347 of the decimal expansion (the 383,347ordinal-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.