1082
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1626
- Proper Divisor Sum (Aliquot Sum)
- 544
- 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
- 540
- Möbius Function
- 1
- Radical
- 1082
- 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
- 44
- 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
- yes
- Odd
- no
Appears in sequences
- Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts.at n=46A000124
- Number of necklaces of partitions of n+1 labeled beads.at n=5A000629
- Expansion of 1/(1-x)^2/(1-x^2)/(1-x^4)/(1-x^10)/(1-x^20).at n=29A001307
- Numbers k such that phi(k) = phi(k+2).at n=24A001494
- Erroneous version of A226999.at n=17A005170
- Number of words of length n in a certain language.at n=20A005819
- Number of points on surface of dodecahedron: a(n) = 30*n^2 + 2 for n > 0.at n=6A005903
- Numbers k such that phi(k) = phi(sigma(k)).at n=41A006872
- Number of unlabeled bisectable trees with 2n+1 nodes.at n=8A007098
- Number of planted trees: all sub-rooted trees from any node are identical; non-root, non-leaf nodes an even distance from the root are of degree 2.at n=59A007439
- Coordination sequence T1 for Zeolite Code AFR.at n=25A008019
- Coordination sequence T4 for Zeolite Code LTN.at n=23A008143
- Coordination sequence T1 for Zeolite Code MFI.at n=21A008161
- Coordination sequence T1 for feldspar.at n=22A008254
- Coordination sequence T2 for feldspar.at n=22A008255
- If a, b in sequence, so is ab+6.at n=17A009307
- Coordination sequence T3 for Zeolite Code VET.at n=20A009904
- Coordination sequence for FeS2-Pyrite, Fe position.at n=16A009957
- Exponential convolution of primes with themselves.at n=5A014345
- Numbers k such that the continued fraction for sqrt(k) has period 13.at n=8A020352