12673
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
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 14400
- Proper Divisor Sum (Aliquot Sum)
- 1727
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11088
- Möbius Function
- -1
- Radical
- 12673
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 125
- 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
- Pseudoprimes to base 12.at n=36A020140
- Pseudoprimes to base 17.at n=32A020145
- Pseudoprimes to base 28.at n=35A020156
- Pseudoprimes to base 70.at n=41A020198
- Strong pseudoprimes to base 86.at n=7A020312
- Number of singular 2 X 2 matrices over Z(n) (i.e., with determinant = 0).at n=22A020478
- Number of noninvertible 2 X 2 matrices over Z/nZ (determinant is a divisor of 0).at n=21A020479
- Numerators of continued fraction convergents to sqrt(769).at n=7A042482
- Haüy rhombic dodecahedral numbers.at n=9A046142
- Product of 3 successive primes.at n=7A046301
- Composite numbers m such that phi(m)*sigma(m) is divisible by m-1.at n=25A065149
- Centered 24-gonal numbers.at n=32A069190
- Diagonal in array of n-gonal numbers A081422.at n=22A081437
- Number of pairs with two different elements which can be obtained by selecting unique elements from two sets with n+1 and n^2 elements respectively and n common elements.at n=23A085490
- Erroneous version of A046142.at n=10A085636
- Numbers that are products of (at least two) consecutive primes.at n=40A097889
- Records in A007535.at n=29A098654
- Sequence of pairs numerator(s(n)), denominator(s(n)) where s(n) is the n-th partial sum of 1/A119753(n).at n=8A120341
- a(n) is the coefficient of the linear term in the polynomial (x-prime(n))*(x-prime(n+1))*(x-prime(n+2))*(x-prime(n+3))*(x-prime(n+4)).at n=1A127489
- Odd squarefree numbers n such that the cyclotomic polynomial Phi(n,x) has height 5.at n=38A152943