11245
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 14616
- Proper Divisor Sum (Aliquot Sum)
- 3371
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8256
- Möbius Function
- -1
- Radical
- 11245
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 60
- 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
- no
- Odd
- yes
Appears in sequences
- Strong pseudoprimes to base 93.at n=15A020319
- Numbers k such that the continued fraction for sqrt(k) has period 31.at n=38A020370
- Every suffix prime and no 0 digits in base 6 (written in base 6).at n=45A024781
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 7.at n=33A031420
- Numbers k such that 3*R_k - 2 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A055557
- a(n) is the smallest number k such that A073813(k) = prime(n).at n=29A073814
- Maximal values of m=a^2+b^2=c^2+d^2 for each x=a+b+c+d=6*p (p=any odd prime).at n=11A093300
- a(n) is such that the a(n)-th composite number is (n-th prime)^2.at n=29A120389
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.at n=7A150793
- a(n) = n*(n-th prime) + (n+1)*((n+1)-th prime).at n=35A152117
- Positive numbers y such that y^2 is of the form x^2+(x+833)^2 with integer x.at n=30A156835
- Integers of the form (k+1)*(2k+1)/12.at n=42A164578
- Number of (n+3) X 9 binary arrays with every 4 X 4 subblock commuting with each horizontal and vertical neighbor 4 X 4 subblock.at n=7A188102
- Number of (n+3)X11 binary arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=5A188104
- Number of (w,x,y) with all terms in {0,...,n} and w < range{w,x,y}.at n=29A212967
- Expansion of 1/(1 - x^4 - x^5 - x^6 - x^7 - x^8 + x^12).at n=40A225501
- T(n,k)=Number of nXk binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.at n=47A228660
- Number of 3 X n binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.at n=7A228662
- Numbers n that are the product of three distinct odd primes and x^2 + y^2 = n has integer solutions.at n=37A264498
- Numbers with digit sum 13 that are multiples of 13.at n=43A283737