2674
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4608
- Proper Divisor Sum (Aliquot Sum)
- 1934
- 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
- 1140
- Möbius Function
- -1
- Radical
- 2674
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 45
- 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
- 9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7*n-5)/2.at n=28A001106
- Coordination sequence T5 for Zeolite Code EUO.at n=32A008100
- Coordination sequence T4 for Zeolite Code MTT.at n=32A008192
- Coordination sequence T2 for Zeolite Code NES.at n=33A008206
- Coordination sequence for FeS2-Marcasite, S position.at n=27A009954
- Number of ordered triples of integers from [ 1..n ] with no global factor.at n=25A015631
- Expansion of 1/((1-x)(1-3x)(1-6x)(1-9x)).at n=3A021504
- Positive integers which apparently never result in a palindrome under repeated applications of the function A056964(x) = x + (x with digits reversed).at n=30A023108
- Generalized Catalan Numbers x^4*A(x)^2 -(1-x+x^4+x^5+x^6)*A(x) + 1 =0.at n=21A023429
- Coordination sequence T6 for Zeolite Code MWW.at n=34A024991
- Even 9-gonal (or enneagonal) numbers.at n=14A028992
- Number of partitions of n into parts 5k+1 and 5k+3 with at least one part of each type.at n=55A035632
- a(n)=(s(n)+3)/8, where s(n)=n-th base 8 palindrome that starts with 5.at n=32A043069
- Numbers k such that string 0,1 occurs in the base 9 representation of k but not of k-1.at n=35A044252
- Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n-1.at n=28A044406
- Numbers n such that string 0,1 occurs in the base 9 representation of n but not of n+1.at n=35A044633
- Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n+1.at n=28A044787
- Numbers whose base-5 representation contains exactly two 1's and three 4's.at n=4A045258
- Numbers with exactly 3 distinct palindromic prime factors.at n=33A046401
- Sum{T(i,n-i): i=0,1,...,n}, array T as in A047040; Sum{T(i,n-i): i=0,1,...,n}, array T given by A047050.at n=13A047041