2174
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3264
- Proper Divisor Sum (Aliquot Sum)
- 1090
- 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
- 1086
- Möbius Function
- 1
- Radical
- 2174
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 138
- 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
- Number of partitions of n if there are two kinds of 1, two kinds of 2 and two kinds of 3.at n=15A000098
- a(n) = 6*a(n-2) - a(n-4).at n=10A006452
- Coordination sequence T4 for Zeolite Code MFS.at n=29A008176
- Coordination sequence T4 for Zeolite Code TON.at n=29A008244
- Coordination sequence T6 for Zeolite Code CON.at n=33A009873
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=3A020391
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 46.at n=3A031544
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 22 ones.at n=18A031790
- Coordination sequence T2 for Zeolite Code ESV.at n=31A038410
- a(n) = 6*a(n-1) - a(n-2), n >= 2, a(0)=1, a(1)=2.at n=5A038725
- Numbers k such that string 7,6 occurs in the base 8 representation of k but not of k-1.at n=37A044249
- Numbers n such that string 7,5 occurs in the base 9 representation of n but not of n-1.at n=29A044319
- Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n-1.at n=23A044406
- Numbers n such that string 7,6 occurs in the base 8 representation of n but not of n+1.at n=37A044630
- Numbers n such that string 7,5 occurs in the base 9 representation of n but not of n+1.at n=29A044700
- Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n+1.at n=23A044787
- Partial sums of A045954.at n=32A045964
- a(n) = Sum_{i=0..n} T(i,n-i), array T as in A048149.at n=15A049712
- Numbers k such that 60*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=17A056658
- Coordination sequence T2 for Zeolite Code ASV.at n=33A057311