3531
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5184
- Proper Divisor Sum (Aliquot Sum)
- 1653
- 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
- 2120
- Möbius Function
- -1
- Radical
- 3531
- Omega Function (Ω)
- 3
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 100
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- no
- Odd
- yes
Appears in sequences
- Squares written in base 7.at n=35A002440
- Coordination sequence T5 for Zeolite Code TER.at n=40A016437
- Number of partitions in expanding space.at n=5A023880
- Coordination sequence T1 for Zeolite Code CGS.at n=44A027365
- Number of partitions of n into parts 4k+2 or 4k+3.at n=57A035366
- Number of binary rooted trees with n nodes and height at most 7.at n=15A036590
- Sum of first n primes of form 4k+1.at n=26A038346
- Expansion of (1/(1-x^2))*Product_{m>=0} 1/(1-x^(2m+1)).at n=38A038348
- Number of partitions of n into a prime number of parts.at n=33A038499
- Numbers having four 1's in base 5.at n=34A043356
- Composite numbers whose 3 prime factors are distinct in length.at n=23A046443
- Let Py(n)=A000330(n)=n-th square pyramidal number. Consider all integer triples (i,j,k), j >= k>0, with Py(i)=Py(j)+Py(k), ordered by increasing i; sequence gives k values.at n=30A053721
- The first n digits of the juxtaposition of the base-2 numbers converted to decimal.at n=11A055143
- Multiples of 11 having only odd digits.at n=39A061833
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 61 ).at n=23A063334
- a(n) = n*(8*n^2 - 5)/3.at n=11A063523
- The a(n)-th composite number is 2^n.at n=10A065891
- Numbers k such that phi(k) = phi(k-2) - phi(k-1).at n=1A066232
- Duplicate of A065891.at n=10A073801
- a(n) = Sum_{i=1..n} Ulam(i), where Ulam(i) denotes the i-th Ulam number.at n=41A078663