1445
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1842
- Proper Divisor Sum (Aliquot Sum)
- 397
- 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
- 1088
- Möbius Function
- 0
- Radical
- 85
- 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
- 47
- 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 m such that Fibonacci(m) ends with m.at n=37A000350
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=12A000443
- A Fielder sequence: a(n) = a(n-1) + a(n-2) - a(n-6), n >= 7.at n=16A001635
- a(n) = n^2 + 1.at n=38A002522
- a(n) = ceiling(n*phi^9), where phi is the golden ratio, A001622.at n=19A004964
- Record values in A005210.at n=41A005211
- Apery (Apéry) numbers: Sum_{k=0..n} (binomial(n,k)*binomial(n+k,k))^2.at n=3A005259
- Bosonic string states.at n=28A005308
- Coordination sequence T1 for Zeolite Code BOG.at n=27A008049
- Coordination sequence T2 for Zeolite Code BPH.at n=29A008056
- a(n) = n OR n^2 (applied to ternary expansions).at n=37A008467
- Expansion of (1-x^2-x^3)/(1-2*x-5*x^2-4*x^3-x^4).at n=6A011367
- Odd numbers k such that d(k) does not divide phi(k).at n=38A015734
- Number of partitions of n into distinct parts, none being 2.at n=47A015744
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFS = MAPSO-46 starting with a T2 atom.at n=4A018966
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7[Be14P14O56].20H2O starting with a T2 atom.at n=4A018996
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NON = Nonasil-[ 4158 ] [Si88O176].4R starting with a T2 atom.at n=10A019210
- Pseudoprimes to base 38.at n=18A020166
- Strong pseudoprimes to base 38.at n=6A020264
- Fibonacci sequence beginning 2, 15.at n=11A022117