17425
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
- 12
- Divisor Sum
- 23436
- Proper Divisor Sum (Aliquot Sum)
- 6011
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 12800
- Möbius Function
- 0
- Radical
- 3485
- Omega Function (Ω)
- 4
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 141
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 2 nonzero squares in exactly 6 ways.at n=9A025289
- Numbers that are the sum of 2 nonzero squares in 5 or more ways.at n=14A025296
- Numbers that are the sum of 2 nonzero squares in 6 or more ways.at n=9A025297
- Numbers that are the sum of 2 distinct nonzero squares in exactly 6 ways.at n=9A025307
- Numbers that are the sum of 2 distinct nonzero squares in 5 or more ways.at n=12A025315
- Numbers that are the sum of 2 distinct nonzero squares in 6 or more ways.at n=9A025316
- Numbers k such that 65*2^k+1 is prime.at n=36A032382
- Numbers whose set of base-16 digits is {1,4}.at n=26A032828
- Numbers whose base-4 representation contains exactly four 0's and four 1's.at n=11A045037
- Numbers n such that n^2 - 1 is expressible as the sum of two nonzero squares in exactly one way.at n=37A050797
- Consider all integer triples (i,j,k), j,k>0, with i^3=j^3+binomial(k+2,3), ordered by increasing i; sequence gives j values.at n=24A054235
- Smallest integer > 1 which is both n-gonal and centered n-gonal.at n=30A072277
- a(n) = n^3 + 6*n^2 + 6*n + 1.at n=24A090197
- k such that k-th prime is of the form 2n^2 + 3n + 3.at n=42A096690
- Numbers m that are the hypotenuse of exactly 22 distinct integer-sided right triangles, i.e., m^2 can be written as a sum of two squares in 22 ways.at n=10A097103
- 33-gonal numbers: n(31n-29)/2.at n=34A098923
- a(n) = 16*n^2 + 1.at n=32A108211
- Numbers of the form (square + 1) that are not squarefree.at n=15A124809
- Primitive subsequence of A111105.at n=30A137559
- Triangle read by rows: T(n,k) (n >= 2, k >= 1) is the number of non-crossing connected graphs on n nodes on a circle such that the distance from a fixed node (root) to the next node is k. Rows are indexed 2,3,4,...; columns are indexed 1,2,3, ... .at n=40A143018