504
504 is the HTTP status code Gateway Timeout — a proxy waited for an upstream server and gave up.
- Even
- Composite
Where 504 fits
Why 504 is special
504 is 502's slower sibling. Where 502 means the upstream answered badly, 504 means it did not answer at all within the time allowed. The distinction matters when debugging: a 502 points at a crash or a malformed response, a 504 at something merely too slow, which is usually a database or an external call.
Not just a mathematical number
504is also used in ways where ordinary arithmetic doesn't apply — each listed below with what genuinely does and doesn't follow from it.
- Mathematical number
A genuine quantity — its mathematical properties (prime, square, factors, and so on) are real facts about it.
A genuine quantity that ordinary arithmetic applies to — it can be prime, even, a perfect square, added to another number meaningfully, and so on.
- Code
Also used as a code — HTTP status codes.
An assigned identifier from a fixed registry or standard — its digits don't represent an amount, and arithmetic on it is meaningless (HTTP status 404 + 1 is not a 'better' status; it's a different, unrelated code).
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 56, 63, 72, 84, 126, 168, 252, 504
- Prime factorisation
- 2^3 × 3^2 × 7
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 504
- Binary
- 111111000
- Octal
- 770
- Hexadecimal
- 1f8
- Roman numeral
- DIV
- Scientific notation
- 5.040 × 10^2
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
504 means an intermediary waited for an upstream server and gave up.
504 is the standard gateway timeout. Cloudflare's 522 narrows it to a connection that never opened, separating an unreachable origin from a slow one.
View 522 →Technology & computing
The Peugeot 504 was engineered with long-travel suspension for poor surfaces and became a mainstay in Africa, where local assembly continued long after European production ended in 1983.
DocumentedTechnology & computingGeography: France and West AfricaPeriod: 1968–2006504 and 502 both come from an intermediary but point at different faults: 502 means the upstream replied with something unusable, 504 means it never replied in time. When debugging, that distinction usually separates a crash from a slow database query or a hanging external call.
DocumentedTechnology & computing
Common questions
Is 504 a prime number?
No, 504 is not prime.
What are the factors of 504?
The factors of 504 are 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 56, 63, 72, 84, 126, 168, 252, 504.
What is 504 in Roman numerals?
504 in Roman numerals is DIV.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 3 August 2026