7430
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13392
- Proper Divisor Sum (Aliquot Sum)
- 5962
- 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
- 2968
- Möbius Function
- -1
- Radical
- 7430
- 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
- 39
- 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
- Number of bipartite partitions.at n=14A002763
- Numbers whose base-3 representation has exactly 9 runs.at n=9A043589
- Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 8.at n=25A043799
- Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 9.at n=9A043806
- Numbers k such that number of runs in the base 3 representation of k is congruent to 9 mod 10.at n=9A043824
- a(n+1) = a(n)/2 if 2|a(n), a(n)/3 if 3|a(n), a(n)/5 if 5|a(n), a(n)/7 if 7|a(n), a(n)/11 if 11|a(n), a(n)/13 if 13|a(n), otherwise 17*a(n)+1.at n=31A057534
- Number of labeled commutative monoids of order n.at n=4A058155
- Diagonal in array of n-gonal numbers A081422.at n=19A081435
- Number of squares on infinite quarter chessboard at <=n knight moves from the corner.at n=46A098500
- Numbers k for which 8*k+1, 8*k+3 and 8*k+7 are primes.at n=39A123978
- a(n) = 190*n + 20.at n=39A139620
- Numbers k such that k^81*(k^81+1)+1 is prime.at n=33A153442
- a(n) = 250*n - 70.at n=30A154361
- Partial sums of A027642.at n=24A173242
- Expansion of 1/(1 - x - x^2 - 3*x^4 + 4*x^5 - 2*x^6).at n=16A175715
- Position of 3^n in A051037 (5-smooth numbers).at n=33A188426
- Expansion of (psi(x^3) / psi(x))^2 in powers of x where psi() is a Ramanujan theta function.at n=28A217786
- Related to Pisano periods: numbers n such that there are n+10 distinct Fibonacci numbers mod n.at n=22A229467
- Numbers n such that (n!-k)/(n-k) is prime for some k.at n=13A239412
- Numbers k such that Phi(k, 12) is prime, where Phi is the cyclotomic polynomial.at n=52A252353