11012
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 5
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 19278
- Proper Divisor Sum (Aliquot Sum)
- 8266
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5504
- Möbius Function
- 0
- Radical
- 5506
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 130
- 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
- Primes in ternary.at n=29A001363
- Numbers k such that the continued fraction for sqrt(k) has period 78.at n=36A020417
- a(n) = Sum_{k=1..n} floor((n/k) * floor((n/k) * floor(n/k))).at n=20A024922
- Lexicographically earliest strictly increasing base 3 autovarious sequence: a(n) = number of distinct a(k) mod 3^n (written in base 3).at n=18A037091
- Coefficients of monic primitive irreducible polynomials over GF(4) listed in lexicographic order.at n=26A058952
- Number of wide partitions of n.at n=47A070830
- Another lazy binary representation of n: similar to A089591 except that the single carry is performed before the increment instead of after.at n=28A089600
- "Lucas-digits": start with "13", append sum of first 2 digits to the preceding number, drop first digit.at n=11A093100
- a(n) = 113 written in base n.at n=2A095616
- a(n) = 113 written in base 10 - n.at n=7A095617
- a(n)=number of tilings of a 4 X n rectangle using tiles that are either 1 X 1 squares or trominoes (here by a tromino we mean a 2 X 2 square with the upper right 1 X 1 square removed; no rotations allowed).at n=9A105262
- Quaternary emirpimes.at n=28A114015
- Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 9.at n=5A116216
- Numbers beginning with a vowel in French.at n=14A118557
- Maximal length of rook tour on an n X n+3 board.at n=23A152134
- Even cyclops numbers.at n=37A162198
- Partial sums of A160120.at n=35A162778
- a(n)=prime(n) written in base the largest digit of prime(n).at n=29A166710
- Numbers n such that sum of squares of factorials of digits of n is a power of 2.at n=27A174570
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=1A181319