1202
1202 is the alarm code that nearly aborted the first Moon landing.
- Even
- Composite
Where 1202 fits
Why 1202 is special
The guidance computer signalled 1202 during descent because it was being given more work than it could complete. It had been designed to shed low-priority tasks and keep flying, and a 26-year-old engineer who knew that recognised the alarm as survivable within seconds. The landing continued.
Factors & digit properties
- Divisors (4)
- 1, 2, 601, 1202
- Prime factorisation
- 2 × 601
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 1202
- Binary
- 10010110010
- Octal
- 2262
- Hexadecimal
- 4b2
- Roman numeral
- MCCII
- Scientific notation
- 1.202 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
The Apollo guidance computer raised alarm 1202 during the 1969 descent because it was overloaded, and kept flying because it had been written to shed low-priority work.
View 1969 →Other connections
- is associated with1969
why?
Strength 0.50, confidence "high".
Technology & computing
The Apollo 11 guidance computer raised 1202 during descent because it was receiving more work than it could finish. It had been written to discard low-priority tasks and keep the essential loop running, and the engineer who knew that said so within seconds. Had the design been to halt on overload, the landing would have been aborted.
DocumentedTechnology & computingPeriod: 20 July 1969
Common questions
Is 1202 a prime number?
No, 1202 is not prime.
What are the factors of 1202?
The factors of 1202 are 1, 2, 601, 1202.
What is 1202 in Roman numerals?
1202 in Roman numerals is MCCII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026