1263
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1688
- Proper Divisor Sum (Aliquot Sum)
- 425
- 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
- 840
- Möbius Function
- 1
- Radical
- 1263
- 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
- 176
- 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
- Number of doubly labeled heap-ordered trees.at n=4A001059
- A generalized partition function.at n=12A002599
- Expansion of g.f.: (1+x^3)*(1+x^4)/((1-x)*(1-x^2)^2*(1-x^4)).at n=30A004657
- Numbers k such that phi(k) = phi(sigma(k)).at n=46A006872
- Coordination sequence T1 for Zeolite Code EPI.at n=22A008090
- Coordination sequence T4 for Zeolite Code MFS.at n=22A008176
- Coordination sequence T7 for Zeolite Code PAU.at n=26A008225
- Expansion of 1/((1-x)^2*Product_{k>=1} (1-x^k)).at n=13A014153
- Powers of sqrt(3) rounded to nearest integer.at n=13A017914
- Powers of sqrt(3) rounded up.at n=13A017915
- Powers of fourth root of 3 rounded to nearest integer.at n=26A018052
- Powers of fourth root of 3 rounded up.at n=26A018053
- Convolution of odd numbers and A001950.at n=10A023659
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (primes).at n=33A024377
- Duplicate of A024377.at n=33A025069
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (primes).at n=32A025077
- a(n) = n^2 + n + 3.at n=35A027688
- [ exp(9/16)*n! ].at n=5A030903
- Twin lucky numbers (upper terms).at n=41A031159
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 22.at n=19A031520