11554
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 17820
- Proper Divisor Sum (Aliquot Sum)
- 6266
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5616
- Möbius Function
- -1
- Radical
- 11554
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 143
- 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
- a(n) = (5*n+1)*(5*n+4).at n=21A001545
- Coordination sequence for body-centered tetragonal lattice.at n=38A008527
- a(0) = 1, a(n) = 32*n^2 + 2 for n > 0.at n=19A010021
- Numbers k such that the continued fraction for sqrt(k) has period 57.at n=21A020396
- a(n) = prime(n)*prime(n+1) - prime(n+1).at n=27A037167
- Numbers k such that k^128 + 1 is prime.at n=31A056994
- Numbers k such that 1000k+1, 1000k+3, 1000k+7, 1000k+9 are all primes.at n=6A064962
- Total sum of squares of parts in all partitions of n.at n=14A066183
- a(n) = (3*n+1)*(3*n+4).at n=35A085001
- Numbers k such that 6^k - 5^(k-1) is prime.at n=31A093713
- Indices of prime numbers in A014258.at n=27A101760
- a(n) = (2*n-1)^2 + (2*n+1)^2.at n=38A108100
- A triangular sequence from a Beraha type recursive polynomial using 5 X 5 centered tridiagonal matrices with chromatic polynomial central roots to its characteristic polynomial.at n=49A123969
- a(n) = A153801(n)/2.at n=25A153804
- a(n) = 2*A001610(n).at n=17A168674
- a(n) = 2*(Lucas(n)^2 - (-1)^n).at n=9A171089
- Number of Hamiltonian cycles in the generalized Petersen Graph P(n,2).at n=33A195197
- Partial sums of A253088.at n=26A255048
- Numbers n such that there is exactly one nontrivial square n-gonal number.at n=55A277449
- Numbers k such that Fibonacci(k) == +-1 (mod k) and k is neither 1 nor prime nor twice a prime.at n=15A279072