42,161
42,161 is a composite number, odd.
42,161 (forty-two thousand one hundred sixty-one) is an odd 5-digit number. It is a composite number with 8 divisors, and factors as 7 × 19 × 317. Written other ways, in hexadecimal, 0xA4B1.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 48
- Digital root
- 5
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 16,124
- Recamán's sequence
- a(151,301) = 42,161
- Square (n²)
- 1,777,549,921
- Cube (n³)
- 74,943,282,219,281
- Divisor count
- 8
- σ(n) — sum of divisors
- 50,880
- φ(n) — Euler's totient
- 34,128
- Sum of prime factors
- 343
Primality
Prime factorization: 7 × 19 × 317
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,161 = [205; (3, 58, 3, 410)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- forty-two thousand one hundred sixty-one
- Ordinal
- 42161st
- Binary
- 1010010010110001
- Octal
- 122261
- Hexadecimal
- 0xA4B1
- Base64
- pLE=
- One's complement
- 23,374 (16-bit)
- Scientific notation
- 4.2161 × 10⁴
- As a duration
- 42,161 s = 11 hours, 42 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵μβρξαʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋨·𝋡
- Chinese
- 四萬二千一百六十一
- Chinese (financial)
- 肆萬貳仟壹佰陸拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,161 = 4
- e — Euler's number (e)
- Digit 42,161 = 8
- φ — Golden ratio (φ)
- Digit 42,161 = 6
- √2 — Pythagoras's (√2)
- Digit 42,161 = 1
- ln 2 — Natural log of 2
- Digit 42,161 = 6
- γ — Euler-Mascheroni (γ)
- Digit 42,161 = 4
Also seen as
UTF-8 encoding: EA 92 B1 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.177.
- Address
- 0.0.164.177
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.164.177
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42161 first appears in π at position 6,795 of the decimal expansion (the 6,795ordinal-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.