1474
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2448
- Proper Divisor Sum (Aliquot Sum)
- 974
- 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
- 660
- Möbius Function
- -1
- Radical
- 1474
- 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
- 140
- 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
- yes
- Odd
- no
Appears in sequences
- Number of hexagonal n-element polyominoes whose graph is a path.at n=9A003104
- a(n) = Sum_t t*F(n,t), where F(n,t) (see A033185) is the number of rooted forests with n (unlabeled) nodes and exactly t rooted trees.at n=8A005197
- Triangular numbers plus quarter squares: n*(n+1)/2 + floor(n^2/4) (i.e., A000217(n) + A002620(n)).at n=44A006578
- Coordination sequence T2 for Zeolite Code AEI.at n=29A008002
- Coordination sequence T1 for Zeolite Code ERI and OFF.at n=28A008093
- Coordination sequence T7 for Zeolite Code PAU.at n=28A008225
- Coordination sequence T2 for Zeolite Code AHT.at n=26A009867
- Coordination sequence T7 for Zeolite Code CON.at n=27A009874
- Coordination sequence for Cr3Si, Cr position.at n=10A009928
- a(0) = 1, a(n) = 23*n^2 + 2 for n>0.at n=8A010013
- Coordination sequence T2 for Zeolite Code SAO.at n=30A019572
- Numbers k such that the continued fraction for sqrt(k) has period 34.at n=7A020373
- Fibonacci sequence beginning 2 9.at n=12A022114
- a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n+1-k), where k = floor((n+1)/2), s = (natural numbers >= 3).at n=20A024312
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers).at n=14A024588
- a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0.at n=21A025001
- Index of 10^n within the sequence of the numbers of the form 9^i*10^j.at n=52A025747
- Number of partitions of n into an odd number of parts, the least being 4; also, a(n+4) = number of partitions of n into an even number of parts, each >=4.at n=53A027190
- 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 38.at n=3A031536
- Numbers in which all pairs of consecutive base-10 digits differ by 3.at n=43A033081