12484
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
- 6
- Divisor Sum
- 21854
- Proper Divisor Sum (Aliquot Sum)
- 9370
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6240
- Möbius Function
- 0
- Radical
- 6242
- Omega Function (Ω)
- 3
- 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
- 63
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Numbers having four 1's in base 9.at n=32A043460
- Sum of n-th row of triangle in A082196.at n=25A082199
- Number of triangular partitions of n of order 3.at n=30A084439
- a(n) = 8*n^2 + 8*n + 4.at n=39A108099
- Sum of the sizes of the Durfee squares of all partitions of n into distinct parts.at n=48A116859
- Triangle read by rows: T(n,k) is the number of 2-compositions of n having largest entry k (1<=k<=n).at n=48A181338
- Numbers n>0 such that 666*10^n+7 is prime.at n=19A186538
- Number of conjugacy classes in Weyl group of type D_n.at n=18A234254
- 1^2 + 3^2, 2^2 + 4^2, 5^2 + 7^2, 6^2 + 8^2, ...at n=39A276764
- Numbers n such that there is exactly one nontrivial square n-gonal number.at n=57A277449
- Number of n X 3 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=3A280668
- T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=18A280673
- Number of 4Xn 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=2A280676
- Numbers k such that k^2+1, (k+2)^2+1 and (k+6)^2+1 are prime.at n=23A302021
- Number of rooted trees with n nodes such that no more than ten subtrees of the same size extend from the same node.at n=13A318804
- Number of rooted trees with n nodes such that no more than ten isomorphic subtrees extend from the same node.at n=13A318857
- Triangular array read by rows: row n consists of the numbers k such that A075255(k) = A385964(n).at n=44A388132