1354
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2034
- Proper Divisor Sum (Aliquot Sum)
- 680
- 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
- 676
- Möbius Function
- 1
- Radical
- 1354
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 52
- 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
- Squares written in base 7.at n=22A002440
- Expansion of x*(1+x-x^2)/((1-x)^4*(1+x)).at n=23A005744
- Number of points on surface of tetrahedron; coordination sequence for sodalite net (equals 2*n^2+2 for n > 0).at n=26A005893
- Positive even numbers that are not the sum of a pair of twin primes.at n=26A007534
- Coordination sequence T4 for Zeolite Code TON.at n=23A008244
- Coordination sequence for body-centered tetragonal lattice.at n=13A008527
- For any circular arrangement of 0..n-1, let S = sum of squares of every sum of three contiguous numbers; then a(n) = # of distinct values of S.at n=15A008782
- Coordination sequence T4 for Zeolite Code RSN.at n=24A009888
- Coordination sequence T2 for Zeolite Code WEI.at n=27A009918
- a(n) = floor( n*(n-1)*(n-2)/29 ).at n=35A011911
- Number of 3's in partitions of n into distinct parts.at n=48A015737
- Number of partitions of n into distinct parts, none being 3.at n=46A015745
- Numbers n such that phi(n) + 8 | sigma(n + 8), where phi = A000010 and sigma = A000203.at n=45A015787
- Expansion of 1/(1 - x^5 - x^6).at n=70A017837
- Conjectured formula for irreducible 6-fold Euler sums of weight 2n+16.at n=15A019459
- Numbers k such that the continued fraction for sqrt(k) has period 27.at n=3A020366
- Fibonacci sequence beginning 1, 24.at n=10A022394
- Sum of digits in n-th term of A022470.at n=22A022475
- a(n) = 1*t(n) + 2*t(n-1) + ...+ k*t(n+1-k), where k=floor((n+1)/2) and t is A001950 (upper Wythoff sequence).at n=16A023867
- a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 2 mod 3}.at n=42A024398