11427
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 16464
- Proper Divisor Sum (Aliquot Sum)
- 5037
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7008
- Möbius Function
- -1
- Radical
- 11427
- 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
- 174
- 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
- a(n) = n*(15*n + 1)/2.at n=39A022273
- Sum of digits in n-th term of A022470.at n=30A022475
- a(n) = floor( Sum_{1 <= i < j <= n} ((sqrt(j)-sqrt(i))^3) ).at n=39A025197
- Number of partitions satisfying (cn(0,5) = 0 and cn(1,5) <= cn(2,5) and cn(1,5) <= cn(3,5) and cn(4,5) <= cn(2,5) and cn(4,5) <= cn(3,5)).at n=50A036812
- Numerators of continued fraction convergents to sqrt(7).at n=13A041008
- Numerators of continued fraction convergents to sqrt(343).at n=7A041648
- One-sixtieth of the even leg of Pythagorean triangles whose other sides are both primes (other than 3, 5 or 13).at n=37A068485
- a(n) = smallest k such that the digit sum of 7k is n.at n=40A077494
- Minimum number k for which the digital sum of k*n is 6*n.at n=7A147826
- a(n) = smallest number m such that m^2 and n^2 share no common digits and m^2 and n^2 together use all 10 digits, a(n) = 0 if no such m exists.at n=21A158931
- a(n) = A159553(n)/n.at n=15A159554
- Numbers such that floor(a(n)^2 / 7) is a square.at n=12A204516
- Denominators of convergents to the general continued fraction 1/(1 + 2/(1 + 3/(1 + 4/(1+ ...)))).at n=10A225436
- a(n) = OP(sum{i=0,...,n} OP(binomial(n,i))), where OP(n) is the odd part of n (A000265).at n=16A249401
- Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=8A254904
- Numerators of the other-side convergents to sqrt(7).at n=12A259597
- Positive fundamental solution x(n) of the generalized Pell equation X^2 - D(n) Y(n) = 2 with D(n) = A261246(n).at n=35A261247
- x-values of solutions to the Diophantine equation x^2 - 7*y^2 = 2.at n=3A266698
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 97", based on the 5-celled von Neumann neighborhood.at n=26A285818
- Numbers k such that (23*10^k + 19)/3 is prime.at n=16A294485