4942
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 8496
- Proper Divisor Sum (Aliquot Sum)
- 3554
- 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
- 2112
- Möbius Function
- -1
- Radical
- 4942
- Omega Function (Ω)
- 3
- 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
- 134
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Numbers k such that k^4 can be written as a sum of four positive 4th powers.at n=28A003294
- Coordination sequence for 7-dimensional cubic lattice.at n=5A008415
- 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 70.at n=3A031568
- Numbers whose set of base-13 digits is {2,3}.at n=20A032813
- Triangular array associated with Schroeder numbers.at n=41A033878
- Number of points of L1 norm 5 in cubic lattice Z^n.at n=7A035599
- Coordination sequence T1 for Zeolite Code SFF.at n=46A038437
- 15-gonal (or pentadecagonal) numbers: n*(13n-11)/2.at n=28A051867
- G.f.: 1 / Product_{k>=1} (1-x^k)^(k-1).at n=19A052847
- Integers n > 196 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 196.at n=43A063049
- Records for the number of integers k such that k is not of the form m + reverse(m) for any m and for some n A067030(n) occurs in the 'Reverse and Add' trajectory of k (cf. A067284).at n=46A067288
- Number of partitions of n into odious numbers (A000069).at n=47A067590
- Number of nodes in virtual, "optimal", chordal graphs of diameter 5, degree =n+1.at n=11A067969
- Numbers k such that k^4 can be written as a sum of four distinct positive 4th powers.at n=28A096739
- Triangle read by rows: T(n,k) (0 <= k <= n) is the number of Delannoy paths of length n that start with exactly k (0,1) steps (or, equivalently, with exactly k (1,0) steps).at n=30A110171
- Array of coordination sequences for cubic lattices (rows) and of numbers of L1 forms in cubic lattices (columns) (array read by antidiagonals).at n=50A119800
- Number of ascents in all Schroeder paths of length 2n.at n=6A125190
- Set m = 0, n = 1. Find smallest k >= 2 such that pi(k) = (k-pi(k)) - (m-pi(m)); set a(n) = pi(k), m = k, n = n+1. Repeat.at n=39A131872
- T(n, k) counts Schroeder n-paths whose ascent starting at the initial vertex has length k. Triangle T(n,k), read by rows.at n=39A132372
- Numbers k such that k and k^2 use only the digits 2, 3, 4, 6 and 9.at n=9A137073