1501
NGC 1501 is the Oyster Nebula.
- Odd
- Composite
Where 1501 fits
Why 1501 is special
Its central star pulsates, which is unusual and gives a direct handle on the mass and structure of a star at that stage.
Factors & digit properties
- Divisors (4)
- 1, 19, 79, 1501
- Prime factorisation
- 19 × 79
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 1501
- Binary
- 10111011101
- Octal
- 2735
- Hexadecimal
- 5dd
- Roman numeral
- MDI
- Scientific notation
- 1.501 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
Both are planetary nebulae; one has a pulsating central star that allows its properties to be measured directly.
View 6853 →Other connections
- is associated with6853
why?
Strength 0.50, confidence "high".
Science
NGC 1501 is a planetary nebula whose central star is a pulsating variable, allowing asteroseismic constraints on the star's properties.
DocumentedSciencePeriod: 1787–
Common questions
Is 1501 a prime number?
No, 1501 is not prime.
What are the factors of 1501?
The factors of 1501 are 1, 19, 79, 1501.
What is 1501 in Roman numerals?
1501 in Roman numerals is MDI.
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