17025
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 28272
- Proper Divisor Sum (Aliquot Sum)
- 11247
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9040
- Möbius Function
- 0
- Radical
- 3405
- 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
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 159
- 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 7 positive 7th powers.at n=41A003374
- a(n) = (1/3)*(n^2 + 2*n + 3)*(n+1)^2.at n=14A014820
- Powers of fifth root of 21 rounded down.at n=16A018174
- Crystal ball sequence for the lattice C_4.at n=7A142993
- a(n) = (2*n^3 + 5*n^2 - 13*n)/2.at n=24A162262
- The number of functions in a finite set for which the sequence of composition powers ends in a length 2 cycle.at n=6A163951
- a(n) = 12*n^2 - 8*n + 1.at n=38A185212
- Subgroups of nimber addition interpreted as binary numbers.at n=42A190939
- Number of -7..7 arrays of length n with the sum ahead of each element differing from the sum following that element by 7 or less.at n=3A221966
- T(n,k)=Number of -k..k arrays of length n with the sum ahead of each element differing from the sum following that element by k or less.at n=48A221967
- Triangle of number of functions in a size n set for which the sequence of composition powers ends in a length k cycle.at n=18A222029
- Number T(n,k) of endofunctions on [n] where the largest cycle length equals k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=23A241981
- Duplicate of A163951.at n=4A246212
- Number of length 3+3 0..n arrays with some disjoint pairs in every consecutive four terms having the same sum.at n=11A247535
- Number of length n 1..(2+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=13A254821
- Integers that are Rhonda numbers to base 18.at n=3A255735
- Row 4 of A328464: a(n) = A276156(16n - 8) / 30.at n=9A328467
- a(n) is the start of the least run of exactly n consecutive positive integers with the same value of A071626, or -1 if no such run exists.at n=47A357386