8,742,421
8,742,421 is a prime, odd.
8,742,421 (eight million seven hundred forty-two thousand four hundred twenty-one) is an odd 7-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x856615.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 7
- Digit sum
- 28
- Digit product
- 3,584
- Digital root
- 1
- Palindrome
- No
- Bit width
- 24 bits
- Reversed
- 1,242,478
- Square (n²)
- 76,429,924,941,241
- Divisor count
- 2
- σ(n) — sum of divisors
- 8,742,422
- φ(n) — Euler's totient
- 8,742,420
Primality
8,742,421 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√8,742,421 = [2956; (1, 3, 7, 12, 1, 6, 12, 10, 8, 1, 4, 1, 1, 3, 1, 1, 1, 10, 3, 4, 1, 1, 3, 5, …)]
Representations
- In words
- eight million seven hundred forty-two thousand four hundred twenty-one
- Ordinal
- 8742421st
- Binary
- 100001010110011000010101
- Octal
- 41263025
- Hexadecimal
- 0x856615
- Base64
- hWYV
- One's complement
- 4,286,224,874 (32-bit)
- Scientific notation
- 8.742421 × 10⁶
- As a duration
- 8,742,421 s = 101 days, 4 hours, 27 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓁨𓁨𓁨𓁨𓁨𓁨𓁨𓁨𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Chinese
- 八百七十四萬二千四百二十一
- Chinese (financial)
- 捌佰柒拾肆萬貳仟肆佰貳拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.133.102.21.
- Address
- 0.133.102.21
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.133.102.21
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 8,742,421 and was likely granted around 2014.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.