526
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 792
- Proper Divisor Sum (Aliquot Sum)
- 266
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 262
- Möbius Function
- 1
- Radical
- 526
- 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
- 79
- Smith Number
- yes
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
- yes
- Odd
- no
Names
- German
- fünfhundertsechsundzwanzig· ordinal: fünfhundertsechsundzwanzigste
- English
- five hundred twenty-six· ordinal: five hundred twenty-sixth
- Spanish
- quinientos veintiséis· ordinal: 526º
- French
- cinq cent vingt-six· ordinal: cinq cent vingt-sixième
- Italian
- cinquecentoventisei· ordinal: 526º
- Latin
- quingenti viginti sex· ordinal: 526.
- Portuguese
- quinhentos e vinte e seis· ordinal: 526º
Appears in sequences
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 50, 100 cents.at n=59A001312
- Restricted partitions.at n=8A001981
- 4th powers written backwards.at n=4A002108
- Absolute value of Glaisher's beta'(2n+1).at n=25A002291
- a(n) = n^2 written backwards.at n=24A002942
- Number of unrooted achiral trees with n nodes.at n=18A003244
- Number of unlabeled minimally 2-connected graphs with n nodes (also called "blocks").at n=9A003317
- Numbers that are the sum of 11 positive 5th powers.at n=22A003356
- Losing initial positions in game: two players alternate in removing >= 1 stones; last player wins; first player may not remove all stones; each move <= 3 times previous move.at n=18A003411
- Add 4, then reverse digits; start with 0.at n=46A003608
- a(n) = floor((n^2 + 6n - 3)/4).at n=42A004116
- Number of degenerate fanout-free Boolean functions of n variables using And, Or, Xor, and Not gates.at n=4A005738
- Centered pentagonal numbers: (5n^2+5n+2)/2; crystal ball sequence for 3.3.3.4.4. planar net.at n=14A005891
- Number of paraffins.at n=10A006001
- Number of stable forests with n nodes.at n=11A006544
- Smith (or joke) numbers: composite numbers k such that sum of digits of k = sum of digits of prime factors of k (counted with multiplicity).at n=21A006753
- Nonsquares such that some permutation of digits is a square.at n=49A007937
- Coordination sequence T5 for Zeolite Code AET.at n=16A008011
- Coordination sequence T3 for Zeolite Code EMT.at n=19A008088
- 3x+1 sequence starting at 97.at n=39A008873