1395
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2496
- Proper Divisor Sum (Aliquot Sum)
- 1101
- 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
- 720
- Möbius Function
- 0
- Radical
- 465
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 127
- Smith Number
- no
- Vampire Number
- yes
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
- Numbers that are the sum of 6 positive 5th powers.at n=37A003351
- Mian-Chowla sequence (a B_2 sequence): a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the pairwise sums of elements are all distinct.at n=30A005282
- Gaussian binomial coefficient [n, 3] for q = 2.at n=3A006096
- Gaussian binomial coefficient [ 2n,n ] for q=2.at n=3A006098
- Gaussian binomial coefficient [ n, n/2 ] for q=2.at n=6A006099
- Shifts left when inverse Moebius transform applied twice.at n=26A007557
- Coordination sequence T2 for Zeolite Code PHI.at n=27A008228
- Coordination sequence T3 for Zeolite Code -CHI.at n=24A009848
- Coordination sequence T3 for Zeolite Code -WEN.at n=27A009864
- Vampire numbers (definition 2): numbers n with an even number of digits which have a factorization n = i*j where i and j have the same number of digits and the multiset of the digits of n coincides with the multiset of the digits of i and j.at n=1A014575
- Numbers k that divide s(k), where s(1)=1, s(j)=25*s(j-1)+j.at n=52A014876
- Vampire numbers: (definition 1): n has a nontrivial factorization using n's digits.at n=6A020342
- Triangle of Gaussian binomial coefficients (or q-binomial coefficients) [n,k] for q = 2.at n=24A022166
- Ordered sequence of distinct terms of the form floor(x^i * floor(x^j)), i,j >= 0, where x = sqrt(5).at n=23A022770
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=3, where c( ) is complement of a( ).at n=47A022935
- Denominator of n*(n-3)*(3*n^2 - 6*n + 2)/(3*(n-1)*(n-2)).at n=29A023418
- a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2), t = A000045 (Fibonacci numbers).at n=12A023860
- a(n) = position of n^2 + (n+1)^2 in A004431 (sums of 2 distinct nonzero squares).at n=49A024513
- Numbers that are sums of 2 distinct positive cubes.at n=46A024670
- Coordination sequence T3 for Zeolite Code IFR.at n=26A024984