12317
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
- 4
- Divisor Sum
- 12540
- Proper Divisor Sum (Aliquot Sum)
- 223
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 12096
- Möbius Function
- 1
- Radical
- 12317
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 156
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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) = (6*n+1)*(6*n+5).at n=18A001513
- a(n) = (4*n+1)*(4*n+5).at n=27A003185
- Products of 2 successive primes.at n=28A006094
- a(n) = Sum_{k=1..n} k*[ (n/k)*[ (n/k)*[ n/k ] ] ].at n=19A024933
- Denominators of continued fraction convergents to sqrt(586).at n=11A042123
- Numbers n such that 279*2^n-1 is prime.at n=23A050898
- a(n) = prime(2*n-1)*prime(2*n).at n=14A089581
- Numbers that are products of (at least two) consecutive primes.at n=39A097889
- Integer part of n#/(p-5)#, where p=preceding prime to n.at n=27A102791
- Numbers n such that sigma(n) - phi(n) is a repdigit greater than 2.at n=40A116020
- Products of two consecutive prime powers.at n=39A121315
- Second trisection of A061037.at n=36A142599
- Numbers having exactly two distinct prime factors p, q with q = p+4.at n=33A143203
- Product of the n-th cousin prime pair.at n=10A143206
- a(n) = (8*n+5)*(8*n+9).at n=13A146302
- Numbers k such that exactly one d, 2 <= d <= k/2, exists which divides binomial(k-d-1, d-1) and is not coprime to k.at n=19A178071
- a(n) = A050376(n)*A050376(n+1) where A050376(n) is the n-th number of the form p^(2^k) with p is prime and k >= 0.at n=34A240521
- Composite numbers of the form A242489(n) - 3.at n=0A242716
- a(n) = prime(n)^2 - 4*prime(n).at n=27A245034
- Row products of table A244365.at n=27A245722