3525
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 5952
- Proper Divisor Sum (Aliquot Sum)
- 2427
- 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
- 1840
- Möbius Function
- 0
- Radical
- 705
- 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
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 118
- 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
- Pentanacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) + a(n-5), a(0)=a(1)=a(2)=a(3)=0, a(4)=1.at n=17A001591
- Number of carbon trees with n carbon atoms.at n=10A005962
- Coordination sequence T1 for Zeolite Code RTH.at n=41A009893
- Coordination sequence for FeS2-Marcasite, S position.at n=31A009954
- Quadruples of different integers from [ 2,n ] with no common factors between triples.at n=20A015629
- a(n) = Lucas(n+4) - (3*n+7).at n=12A023537
- Expansion of 1/((1-2x)(1-3x)(1-6x)(1-10x)).at n=3A025940
- a(n) = Lucas(2*n+3) - (6*n+4).at n=6A027000
- Duplicate of A023537.at n=12A027962
- A convolution triangle of numbers, generalizing Pascal's triangle A007318.at n=31A035324
- Numbers whose base-5 representation contains exactly three 0's and two 1's.at n=36A045171
- 4-fold convolution of A001700(n), n >= 0.at n=4A045894
- Numbers m such that there are precisely 3 groups of order m.at n=16A055561
- Positive numbers whose product of digits is 10 times their sum.at n=19A062043
- Least k > n^2 such that (k^3+1)/(n^2+1) is an integer.at n=49A066506
- a(1)=a(2)=1, a(n+2)=a(n+1)+a(n)+(-2)^n.at n=13A073845
- Smallest number m such that m and the product of digits of m are both divisible by 3n, or 0 if no such number exists.at n=24A073910
- Smallest number m such that m and the product of digits of m are both divisible by 5n, or 0 if no such number exists.at n=14A073911
- 2-apexes of Omega: numbers k such that Omega(k-2)< Omega(k-1) < Omega(k) > Omega(k+1) > Omega(k+2), where Omega(m) = the number of prime factors of m, counting multiplicity.at n=38A076759
- Smallest multiple of n whose digital product is also a positive multiple of n, or 0 if no such number exists.at n=74A085124