161,040
161,040 is a composite number, even.
161,040 (one hundred sixty-one thousand forty) is an even 6-digit number. It is a composite number with 80 divisors, and factors as 2⁴ × 3 × 5 × 11 × 61. Its proper divisors sum to 392,496, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x27510.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 40,161
- Recamán's sequence
- a(200,076) = 161,040
- Square (n²)
- 25,933,881,600
- Cube (n³)
- 4,176,392,292,864,000
- Divisor count
- 80
- σ(n) — sum of divisors
- 553,536
- φ(n) — Euler's totient
- 38,400
- Sum of prime factors
- 88
Primality
Prime factorization: 2 4 × 3 × 5 × 11 × 61
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√161,040 = [401; (3, 2, 1, 4, 20, 2, 1, 2, 1, 2, 20, 4, 1, 2, 3, 802)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-one thousand forty
- Ordinal
- 161040th
- Binary
- 100111010100010000
- Octal
- 472420
- Hexadecimal
- 0x27510
- Base64
- AnUQ
- One's complement
- 4,294,806,255 (32-bit)
- Scientific notation
- 1.6104 × 10⁵
- As a duration
- 161,040 s = 1 day, 20 hours, 44 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρξαμʹ
- Chinese
- 一十六萬一千零四十
- Chinese (financial)
- 壹拾陸萬壹仟零肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 161040, here are decompositions:
- 7 + 161033 = 161040
- 23 + 161017 = 161040
- 31 + 161009 = 161040
- 43 + 160997 = 161040
- 59 + 160981 = 161040
- 71 + 160969 = 161040
- 73 + 160967 = 161040
- 107 + 160933 = 161040
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A7 94 90 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.117.16.
- Address
- 0.2.117.16
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.117.16
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 161,040 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 161040 first appears in π at position 38,268 of the decimal expansion (the 38,268ordinal-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°.