161,142
161,142 is a composite number, even.
161,142 (one hundred sixty-one thousand one hundred forty-two) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 107 × 251. Its proper divisors sum to 165,450, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x27576.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 15
- Digit product
- 48
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 241,161
- Recamán's sequence
- a(199,872) = 161,142
- Square (n²)
- 25,966,744,164
- Cube (n³)
- 4,184,333,088,075,288
- Divisor count
- 16
- σ(n) — sum of divisors
- 326,592
- φ(n) — Euler's totient
- 53,000
- Sum of prime factors
- 363
Primality
Prime factorization: 2 × 3 × 107 × 251
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√161,142 = [401; (2, 2, 1, 4, 1, 15, 1, 1, 3, 1, 2, 4, 1, 5, 1, 4, 1, 1, 1, 1, 4, 4, 1, 266, …)]
Period length 48 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-one thousand one hundred forty-two
- Ordinal
- 161142nd
- Binary
- 100111010101110110
- Octal
- 472566
- Hexadecimal
- 0x27576
- Base64
- AnV2
- One's complement
- 4,294,806,153 (32-bit)
- Scientific notation
- 1.61142 × 10⁵
- As a duration
- 161,142 s = 1 day, 20 hours, 45 minutes, 42 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρξαρμβʹ
- Chinese
- 一十六萬一千一百四十二
- Chinese (financial)
- 壹拾陸萬壹仟壹佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 161142, here are decompositions:
- 5 + 161137 = 161142
- 19 + 161123 = 161142
- 71 + 161071 = 161142
- 83 + 161059 = 161142
- 89 + 161053 = 161142
- 103 + 161039 = 161142
- 109 + 161033 = 161142
- 173 + 160969 = 161142
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A7 95 B6 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.117.118.
- Address
- 0.2.117.118
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.117.118
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 161,142 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 161142 first appears in π at position 306,975 of the decimal expansion (the 306,975ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.