1420
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 3024
- Proper Divisor Sum (Aliquot Sum)
- 1604
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 560
- Möbius Function
- 0
- Radical
- 710
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 34
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Number of graphical partitions of 2n.at n=13A000569
- Number of partitions of n into prime parts.at n=56A000607
- Partial sums of A006206.at n=18A001461
- Squares written in base 8.at n=27A002441
- Restricted partitions.at n=15A002574
- Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals rooted at a cell up to rotation and reflection.at n=19A003452
- Coordination sequence T4 for Zeolite Code AET.at n=26A008010
- Coordination sequence T2 for Zeolite Code VFI.at n=29A008246
- Poupard's triangle: triangle of numbers arising in enumeration of binary trees.at n=22A008301
- Poupard's triangle: triangle of numbers arising in enumeration of binary trees.at n=18A008301
- Coordination sequence T4 for Zeolite Code VET.at n=23A009905
- Coordination sequence for alpha-Mn, Position Mn3.at n=10A009952
- a(n) is nonsquarefree and is sum of first k nonsquarefrees for some k.at n=13A013935
- Numbers k such that sigma(k) = sigma(k+10).at n=8A015880
- Number of lines through exactly 6 points of an n X n grid of points.at n=35A018813
- Number of lines through exactly 8 points of an n X n grid of points.at n=46A018815
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTW = ZSM-12 Nan[AlnSi28-nO56] starting with a T5 atom.at n=10A019195
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence), t = A001950 (upper Wythoff sequence).at n=14A024686
- Number of partitions of n with distinct parts p(i) such that if i != j, then |p(i) - p(j)| >= 3.at n=62A025157
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, with initial values 1,1,1,2.at n=9A025272