5652
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 14378
- Proper Divisor Sum (Aliquot Sum)
- 8726
- 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
- 1872
- Möbius Function
- 0
- Radical
- 942
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 129
- 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 discordant permutations.at n=5A000562
- Number of protruded partitions of n with largest part at most 2.at n=15A005403
- Convolve Fibonacci and Pell numbers.at n=11A006684
- Expansion of 1/((1-5x)(1-7x)(1-12x)).at n=3A020341
- Numbers k such that 87*2^k+1 is prime.at n=18A032393
- Numbers whose set of base-7 digits is {2,3}.at n=35A032807
- Number of proper factorizations of the numbers with a record number of proper factorizations.at n=53A033834
- G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 2 generated by (1,2)(3,4)(5,6).at n=6A036724
- a(n) = Sum_{i=1..n} T(i,n-i), where T is A049615.at n=41A049616
- Triangle of partial row sums of triangle A037027(n,m), n >= m >= 0 (Fibonacci convolution triangle).at n=56A054446
- Step cyclic shifted sequence structures using a maximum of six different symbols.at n=10A056433
- Number of n-celled polyominoes, where the cells are 1 X 2 rectangles with some of the edges of length 2 replaced by curved arcs that either sag inwards or bulge outwards.at n=4A056755
- Triangle T(n,k) defined by Sum_{n >= 0,m >= 0} T(n,m)*x^m*y^n = 1 + y*(1 + 3*x - 4*x^2*y - 3*x^2*y^2 - 3*x^3*y^2 + 4*x^4*y^3)/((1 - y - 2*x*y - x*y^2 + x^3*y^3)*(1 - x*y)).at n=49A061702
- Triangle read by rows: T(n,k) is the number of k-matchings in the C_n X P_2 graph (C_n is the cycle graph on n vertices and P_2 is the path graph on 2 vertices).at n=46A102079
- Numbers k such that k^2-1 and k^2+1 are semiprimes.at n=42A108278
- Product of a prime number p and the number of primes smaller than p.at n=36A117495
- a(0)=1. a(n) = sum of the earlier terms which are divisible by (the number of 1's in the binary representation of n).at n=21A123757
- Antidiagonal sums of the array A051776.at n=39A141395
- Averages of twin primes of the form : i^2+j^2, as sum of two squares.at n=12A143793
- The isolated nonprimes that are the sum of two successive primes.at n=41A167597