2972
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5208
- Proper Divisor Sum (Aliquot Sum)
- 2236
- 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
- 1484
- Möbius Function
- 0
- Radical
- 1486
- Omega Function (Ω)
- 3
- 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
- 97
- Smith Number
- no
- Vampire Number
- no
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
- yes
- Odd
- no
Appears in sequences
- Number of unrooted nonseparable planar maps with n edges and a distinguished face.at n=8A000087
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^3)).at n=44A000601
- Coordination sequence T5 for Zeolite Code EUO.at n=34A008100
- If a, b in sequence, so is ab+4.at n=47A009303
- Ordered sequence of distinct terms of the form floor(exp(i) * floor(exp(j))), i,j >= 0.at n=32A022765
- Numbers k such that Fibonacci(k) == -3 (mod k).at n=40A023164
- a(n) = (d(n)-r(n))/2, where d = A026060 and r is the periodic sequence with fundamental period (1,0,0,0).at n=24A026061
- Numbers k such that k*(k+7) is a palindrome.at n=9A028564
- 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 26.at n=42A031524
- Numbers whose set of base-7 digits is {1,4}.at n=37A032819
- First differences of A002002.at n=4A035028
- Numbers whose base-7 representation contains exactly three 4's.at n=25A043411
- Numbers k such that the string 6,2 occurs in the base 9 representation of k but not of k-1.at n=40A044307
- Numbers n such that string 7,2 occurs in the base 10 representation of n but not of n-1.at n=32A044404
- Numbers n such that string 7,2 occurs in the base 10 representation of n but not of n+1.at n=32A044785
- Smallest of first string of exactly 2n-1 consecutive composite integers.at n=13A045881
- Number of different values of i^2+j^2+k^2+l^2 for i,j,k,l in [ 0,n ].at n=30A047801
- Convolution of A049612 with A011782.at n=7A055589
- Composite n such that phi(n+2) = phi(n)+2.at n=36A056774
- First subsequent, disjoint occurrence of n consecutive nonprimes.at n=23A060064