12281
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 12282
- 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
- 12280
- Möbius Function
- -1
- Radical
- 12281
- 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
- 125
- 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
- 1469
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of bicentered hydrocarbons with n atoms.at n=17A000200
- E.g.f. exp(-x)/(1-5*x).at n=4A001908
- Sequence of 2 Pythagorean triangles, each with a leg and hypotenuse prime. The leg of the second triangle is the hypotenuse of the first.at n=39A048270
- Sequence of 3 Pythagorean triangles, each with a leg and hypotenuse prime. The hypotenuse of each triangle is the leg of the next triangle.at n=5A048295
- Second term of weak prime quintets: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2).at n=27A054824
- Numbers k such that 16^k - 15^k is prime.at n=6A062582
- Primes p such that p+7 == 0 (mod phi(p+7)).at n=26A067606
- Smallest prime equal to the sum of 2n+1 consecutive primes.at n=33A070934
- Smallest odd prime that is the sum of 2n+1 consecutive primes.at n=33A082244
- Smallest prime that is the sum of prime(n) consecutive primes.at n=18A082277
- Primes from merging of 5 successive digits in decimal expansion of exp(2).at n=31A105001
- Length of the longest perfect parity pattern with n columns.at n=44A118141
- Number of base 29 circular n-digit numbers with adjacent digits differing by 4 or less.at n=4A125366
- Primes among variant of permutational numbers A134750.at n=38A134766
- Numbers k such that (k,k+8) forms a pair of consecutive primes ending respectively in 1 and 9.at n=31A141026
- Primes congruent to 34 mod 37.at n=36A142143
- Primes congruent to 22 mod 41.at n=36A142219
- Primes congruent to 26 mod 43.at n=31A142275
- Primes congruent to 14 mod 47.at n=32A142365
- Primes congruent to 31 mod 49.at n=37A142440