7442
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 11349
- Proper Divisor Sum (Aliquot Sum)
- 3907
- 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
- 3660
- Möbius Function
- 0
- Radical
- 122
- 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
- 70
- 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 n-node unlabeled connected graphs without endpoints.at n=8A004108
- Coordination sequence for Cr3Si, Si position.at n=22A009927
- Numbers k such that k | 11^k + 1.at n=16A015960
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite LTL = Linde Type L K6Na3[Al9Si27O72].21H2O starting with a T2 atom.at n=5A019034
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=24A020364
- Arrange digits of cubes in descending order.at n=14A032554
- Number of partitions of n such that cn(0,5) = cn(1,5) <= cn(2,5) = cn(4,5) < cn(3,5).at n=69A036863
- a(0)=1; a(n) = Sum_{j<n, gcd(n,a(j)) = 1} a(j).at n=33A055935
- McKay-Thompson series of class 47A for the Monster group.at n=53A058690
- Reflective numbers: k such that the decimal encoding of the prime factorization of k (A067599) is palindromic.at n=38A066985
- First of 3 consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2} are in A067259.at n=38A071319
- If D[n] is divisor-set of n, then in set of 1+D only 2 primes occur:{2,3}; also n is not squarefree.at n=23A072607
- Numbers n such that n and n+2 are of the form p^2*q where p and q are distinct primes.at n=27A074173
- a(n) = 4^n + 5^n + 9^n.at n=4A074564
- Maximum number of regions into which the plane can be divided using n (concave) quadrilaterals.at n=31A077591
- a(n) = 2*prime(n)^2.at n=17A079704
- Sum of n-th row of triangle in A082196.at n=21A082199
- Number of nonisomorphic partitions of n on the Ferrers diagram.at n=35A095814
- Numbers k such that both k and the k-th prime have nonincreasing digits.at n=38A116067
- Number of base 6 n-digit numbers with adjacent digits differing by one or less.at n=8A126360