11287
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11288
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11286
- Möbius Function
- -1
- Radical
- 11287
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 86
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1365
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 68 ones.at n=8A031836
- Numerators of continued fraction convergents to sqrt(322).at n=4A041608
- Primes p such that p, p+12, p+24 are consecutive primes.at n=6A052188
- Primes p such that x^27 = 2 has no solution mod p, but x^9 = 2 has a solution mod p.at n=1A059354
- Primes p such that x^54 = 2 has no solution mod p, but x^6 = 2 has a solution mod p.at n=24A059665
- Primes p such that x^54 = 2 has no solution mod p, but x^18 = 2 has a solution mod p.at n=1A059666
- Primes p such that x^9 = 2 has a solution mod p, but x^(9^2) = 2 has no solution mod p.at n=2A070185
- Final terms of rows of A077321.at n=32A077323
- 2*3*5*6*...*a(n) -+ 1 are primes, with a(n+1) > a(n).at n=37A087900
- Primes from merging of 5 successive digits in decimal expansion of exp(Pi).at n=24A105010
- Numbers such that pre- and post-concatenating 7, 13 and 31 results in six primes.at n=2A125197
- a(n) = 8*n^2 - 7*n + 1.at n=38A125201
- List of triples of primes with common difference 12.at n=18A128312
- Row sums of triangle A132921.at n=18A132922
- Primes that are simultaneously of the forms 24i+7 and 7j+24.at n=30A137657
- Primes congruent to 2 mod 37.at n=35A142112
- Primes congruent to 12 mod 41.at n=33A142209
- Primes congruent to 21 mod 43.at n=34A142270
- Primes congruent to 7 mod 47.at n=31A142358
- Primes congruent to 17 mod 49.at n=32A142428