11122
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 17136
- Proper Divisor Sum (Aliquot Sum)
- 6014
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5412
- Möbius Function
- -1
- Radical
- 11122
- 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
- 130
- 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
- Cubes written in base 3.at n=4A004633
- Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order.at n=33A007931
- Even heptagonal numbers (A000566).at n=33A014640
- Expansion of 1/((1-3x)(1-8x)(1-10x)(1-11x)).at n=3A028102
- "BFJ" (reversible, size, labeled) transform of 2,2,2,2...at n=8A032038
- a(n) = (2*n + 1)*(5*n + 1).at n=33A033571
- Denominators of continued fraction convergents to sqrt(283).at n=9A041533
- Product of digits of n is a nonzero single-digit square.at n=47A050627
- Successive positions in Tower of Hanoi (with three pegs {0,1,2}) where xyz means smallest disk is on peg z, second smallest is on peg y, third smallest on peg x, etc. and leading zeros indicate largest disks are all on peg 0.at n=28A055662
- Coefficients of monic irreducible polynomials over GF(3) listed in lexicographic order.at n=24A058944
- Coefficients of monic primitive irreducible polynomials over GF(3) listed in lexicographic order.at n=10A058949
- Coefficients of monic primitive irreducible polynomials over GF(4) listed in lexicographic order.at n=30A058952
- Digitized partition numbers: numbers with (weakly) increasing digits ordered by sum of their digits then by the numbers themselves.at n=42A060002
- Numbers in Morse code, with 1 for a dot, 2 for a dash and 0 between digits/letters.at n=3A060109
- Coefficients of irreducible polynomials over GF(3) listed in lexicographic order.at n=27A065020
- Smallest multiple of n with digit sum = 7, or 0 if no such number exists, e.g. a(3k)= a(11k) = 0.at n=66A069526
- Integers whose decimal expansion start with 1, do not contain zeros and each successive digit to the right is at most one greater than the previous digit.at n=25A071159
- a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].at n=43A072921
- Fibonacci sequence in base 2 of the alternate number system.at n=8A085652
- Numbers n with digits in nondecreasing order such that sum of the reciprocal of digits is an integer.at n=20A091784