1922
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 2979
- Proper Divisor Sum (Aliquot Sum)
- 1057
- 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
- 930
- Möbius Function
- 0
- Radical
- 62
- Omega Function (Ω)
- 3
- 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
- 50
- 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
- a(n) = 2*n^2.at n=31A001105
- Numbers which are the sum of 3 nonzero 4th powers.at n=45A003337
- Sums of distinct nonzero 4th powers.at n=48A003999
- Number of points on surface of dodecahedron: a(n) = 30*n^2 + 2 for n > 0.at n=8A005903
- Bessel numbers: the number of nonoverlapping partitions of an n-set into equivalence classes.at n=8A006789
- Coordination sequence T1 for Zeolite Code CON.at n=31A009868
- Numbers m such that phi(m) * sigma(m) + k^2 is not a square for any k.at n=17A015713
- Numbers k such that the continued fraction for sqrt(k) has period 24.at n=29A020363
- Number of 2's in n-th term of A022482.at n=28A022485
- Triangle T by rows: second differences of Motzkin triangle (A026300), (i >= -1, -1<=j<=i).at n=72A026120
- a(n) = number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, s(n) = 5, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n-4), where T is the array in A026120.at n=6A026126
- a(n) = A026120(2n,n+1).at n=4A026132
- a(n) = T(2n, n), T given by A026758.at n=6A026759
- a(n) = T(n, floor(n/2)), T given by A026758.at n=12A026764
- Unbalanced strings of length n.at n=11A027556
- Molien series for complete weight enumerator of self-dual code over GF(5).at n=23A028344
- 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 42.at n=13A031540
- Concatenation of n and n + 3.at n=18A032608
- Dirichlet convolution of squares with themselves.at n=30A034714
- Coordination sequence for 31-dimensional cubic lattice.at n=2A035726