12790
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 23040
- Proper Divisor Sum (Aliquot Sum)
- 10250
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5112
- Möbius Function
- -1
- Radical
- 12790
- 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
- 125
- 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
- Values of A038007 not ending in 6 or 8.at n=23A038009
- Closed 3-dimensional ball numbers (version 2): a(n)= number of integer points (i,j,k) contained in a closed ball of diameter n, centered at (1/2,0,0).at n=29A053593
- a(n) = 15*n^2 + 6*n + 1.at n=29A080861
- Number of compositions of n into 4 parts such that no two adjacent parts are equal.at n=40A106353
- Number of threshold functions on n X n grid.at n=12A114146
- Duplicate of A114146.at n=12A115027
- a(n) = 441*n + 1.at n=28A158322
- Number of nonempty subsets of {1, 2, ..., n} with <= 4 pairwise coprime elements.at n=37A187265
- a(n) is the number of digits in the decimal representation of the smallest power of n that contains nine consecutive identical digits.at n=0A217184
- a(n) is the number of digits in the decimal representation of the smallest power of n that contains nine consecutive identical digits.at n=2A217184
- a(n) is the number of digits in the decimal representation of the smallest power of n that contains nine consecutive identical digits.at n=6A217184
- a(n) is the number of digits in the decimal representation of the smallest power of n that contains nine consecutive identical digits.at n=30A217184
- a(n) is the number of digits in the decimal representation of the smallest power of 2 that contains n consecutive identical digits.at n=8A217185
- a(n) is the number of digits in the decimal representation of the smallest power of 2 that contains n consecutive identical digits.at n=9A217185
- Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having determinant equal to one, with rows and columns of the latter in nondecreasing lexicographic order.at n=8A227638
- T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having determinant equal to one, with rows and columns of the latter in nondecreasing lexicographic order.at n=57A227641
- Number of arrays of median of three adjacent elements of some length n+2 0..3 array, with no adjacent equal elements in the latter.at n=8A229007