1522
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2286
- Proper Divisor Sum (Aliquot Sum)
- 764
- 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
- 760
- Möbius Function
- 1
- Radical
- 1522
- 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
- 34
- Smith Number
- no
- Vampire Number
- no
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
Appears in sequences
- Half the number of binary relations on n unlabeled points.at n=3A001173
- Numbers k such that 5*2^k - 1 is prime.at n=19A001770
- Numbers k such that phi(2k+1) < phi(2k).at n=18A001837
- a(n) = n^2 + 1.at n=39A002522
- Number of partitions into one kind of 1's, two kinds of 2's, and three kinds of 3's.at n=22A002597
- Numbers that are the sum of 3 nonzero 6th powers.at n=8A003359
- Numbers that are the sum of at most 3 nonzero 6th powers.at n=18A004854
- Numbers that are the sum of at most 4 nonzero 6th powers.at n=28A004855
- Numbers that are the sum of at most 5 nonzero 6th powers.at n=40A004856
- Expansion of x*(1+x-x^2)/((1-x)^4*(1+x)).at n=24A005744
- Coordination sequence T1 for Zeolite Code AST.at n=28A008036
- Coordination sequence T1 for Zeolite Code ATT.at n=28A008041
- Coordination sequence T3 for Zeolite Code EMT.at n=32A008088
- Coordination sequence T1 for Zeolite Code LEV.at n=29A008127
- Coordination sequence T2 for Zeolite Code VFI.at n=30A008246
- If a, b are in the sequence, so is ab+3.at n=38A009302
- Coordination sequence for sigma-CrFe, Position Xa.at n=10A009962
- Continued fraction for cube root of 15.at n=57A010245
- a(n) = floor(n*(n-1)*(n-2)/16).at n=30A011898
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite EUO = EU-1 Nan[AlnSi112-nO224] starting with a T5 atom.at n=10A019124