11118
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 23760
- Proper Divisor Sum (Aliquot Sum)
- 12642
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3456
- Möbius Function
- 1
- Radical
- 11118
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 161
- 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 whose maximal base-10 run length is 4.at n=17A033285
- Denominators of continued fraction convergents to sqrt(370).at n=5A041701
- Numbers having four 1's in base 10.at n=11A043496
- Numbers k such that 2^k + 15 is prime.at n=41A057197
- a(1) = 1; a(n+1) = floor(sqrt(Sum_{k=1..n} a(k)^2)).at n=30A067859
- List of codewords in binary lexicode with Hamming distance 5 written as decimal numbers.at n=36A075931
- Lunar fourth powers: n*n*n*n, where * is lunar multiplication.at n=18A087051
- a(n) is the absolute value of floor(x^n), where x = e/(2-e) = -3.784422... is derived from e=A001113.at n=6A088655
- Keep only the first digit of each integer and concatenate them. The result is the concatenation of all integers of the sequence.at n=25A106000
- Averages of twin prime pairs such that p1 * p2 + AverageTwinPrime is prime.at n=40A154667
- Lexicographically earliest increasing sequence which lists the positions of the zero digits in the sequence.at n=12A167519
- a(n) = (10^n + 62)/9 for n>0.at n=4A173734
- Triangle read by rows: row n (n>=1) enumerates marked mesh patterns of type R_n^(1,0,2,0).at n=19A182544
- Number of nX4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.at n=14A195958
- Numbers with digital product = 8.at n=35A199989
- Composite numbers whose product of digits is 8.at n=24A201056
- Numbers consisting of ones and eights.at n=31A213084
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 150", based on the 5-celled von Neumann neighborhood.at n=34A270323
- Numbers having digits in nondecreasing order and sum of digits greater than or equal to the product of digits.at n=49A274125
- a(n) is the number of subsets of {1, 2, ..., n} with product of all entries <= n^2 + n.at n=49A298880