4,161
4,161 is a composite number, odd.
Properties
Primality
Prime factorization: 3 × 19 × 73
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- four thousand one hundred sixty-one
- Ordinal
- 4161st
- Binary
- 1000001000001
- Octal
- 10101
- Hexadecimal
- 0x1041
- Base64
- EEE=
- One's complement
- 61,374 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵δρξαʹ
- Mayan (base 20)
- 𝋪·𝋨·𝋡
- Chinese
- 四千一百六十一
- Chinese (financial)
- 肆仟壹佰陸拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 4,161 = 1
- e — Euler's number (e)
- Digit 4,161 = 3
- φ — Golden ratio (φ)
- Digit 4,161 = 2
- √2 — Pythagoras's (√2)
- Digit 4,161 = 5
- ln 2 — Natural log of 2
- Digit 4,161 = 2
- γ — Euler-Mascheroni (γ)
- Digit 4,161 = 2
Also seen as
UTF-8 encoding: E1 81 81 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.16.65.
- Address
- 0.0.16.65
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.16.65
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 4161 first appears in π at position 12,880 of the decimal expansion (the 12,880ordinal-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.