5260
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
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 11088
- Proper Divisor Sum (Aliquot Sum)
- 5828
- 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
- 2096
- Möbius Function
- 0
- Radical
- 2630
- 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
- 54
- 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 plane partitions of n with at most two rows.at n=19A000990
- Number of multigraphs with 4 nodes and n edges.at n=24A003082
- Sum of orders of all 2 X 2 matrices with entries mod n.at n=5A006045
- Coordination sequence T2 for Milarite.at n=45A008257
- Convolution of natural numbers with composite numbers.at n=24A023539
- a(n) = 1*t(n) + 2*t(n-1) + ...+ k*t(n+1-k), where k=floor((n+1)/2) and t is A001950 (upper Wythoff sequence).at n=27A023867
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = A001950 (upper Wythoff sequence).at n=26A024864
- 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 36.at n=35A031534
- Base-6 palindromes that start with 4.at n=16A043013
- Erroneous version of A006045 (I think!).at n=6A048690
- Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.at n=16A061777
- Number of + signs needed to write the partitions of n (A000041) as sums.at n=21A076276
- Convolution of the prime numbers with phi(n).at n=24A086734
- a(n) is the number of partitions of n into parts not greater than A020639(n).at n=54A097359
- Triangle read by rows: T(n,k) is the number of Dyck n-paths with k large components, 0 <= k <= n/2.at n=39A097877
- a(n+1) is the integer part of sqrt(2*a(n)^2).at n=23A102822
- Row sums of triangle A125280, which is the convolution triangle of A030266.at n=7A125280
- Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 7.at n=42A136912
- Number of cycles of length 3 in the queen graph associated with an n X n chessboard.at n=10A144298
- Expansion of 1/(1 - x^4 - x^5 - x^6 + x^10).at n=51A147652