1273
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1360
- Proper Divisor Sum (Aliquot Sum)
- 87
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1188
- Möbius Function
- 1
- Radical
- 1273
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 31
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) is the number of partitions of 2n that can be obtained by adding together two (not necessarily distinct) partitions of n.at n=11A002219
- Numbers that are the sum of 8 positive 5th powers.at n=45A003353
- Number of loopless rooted planar maps with 3 faces and n vertices and no isthmuses. Also a(n)=T(4,n-3), array T as in A049600.at n=16A006416
- Coordination sequence T1 for Zeolite Code AFR.at n=27A008019
- Coordination sequence T3 for Zeolite Code TON.at n=22A008243
- Composite but smallest prime factor >= 17.at n=42A008367
- Coordination sequence T2 for Zeolite Code ZON.at n=25A009920
- Coordination sequence T3 for Zeolite Code ZON.at n=25A009921
- Number of 7's in all the partitions of n into distinct parts.at n=50A015742
- Number of partitions of n into distinct parts, none being 7.at n=44A015754
- Coordination sequence T1 for Zeolite Code TER.at n=24A016433
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DAC = Dachiardite Na5[Al5Si19O48].12H2O starting with a T1 atom.at n=10A019102
- Pseudoprimes to base 30.at n=16A020158
- Pseudoprimes to base 37.at n=28A020165
- Pseudoprimes to base 68.at n=26A020196
- Pseudoprimes to base 96.at n=10A020224
- Strong pseudoprimes to base 68.at n=10A020294
- Strong pseudoprimes to base 96.at n=2A020322
- Numbers k such that the continued fraction for sqrt(k) has period 36.at n=6A020375
- n-th composite is sum of first k composites for some k.at n=35A020642