7453
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7740
- Proper Divisor Sum (Aliquot Sum)
- 287
- 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
- 7168
- Möbius Function
- 1
- Radical
- 7453
- Omega Function (Ω)
- 2
- 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
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- [ exp(9/23)*n! ].at n=6A030820
- Rounded total surface area of a regular dodecahedron with edge length n.at n=19A071397
- Low point in segment n of A079051.at n=35A117518
- Row sums of triangle A131243.at n=11A131244
- Numbers which are the sum of 3 cubes of distinct odd primes.at n=21A138853
- Numbers which are the sum of three cubes of distinct primes.at n=39A138854
- a(n) = 3*A146085(n) - 2.at n=42A146091
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.at n=6A151240
- Number of right triangles with nonnegative integer coordinates less than or equal to n and one corner at the origin.at n=37A155154
- a(n) = 324*n + 1.at n=22A158272
- Number of (n+1)X3 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=3A183847
- Number of (n+1)X5 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=1A183849
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=11A183854
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=13A183854
- A185243(n) is the a(n)-th triangular number.at n=39A185257
- Numerators of Bernoulli(x)^x.at n=12A199749
- Number of partitions of n such that the number of parts is not divisible by the greatest part.at n=31A200727
- Numerators from expansion of e.g.f. (x^3/3!)/(e^x-1-x-(x^2/2!)).at n=8A249024
- Fundamental discriminants d uniquely characterizing all complex biquadratic fields Q(sqrt(-3),sqrt(d)) which have 3-class group of type (3,3) and second 3-class group isomorphic to SmallGroup(729,95).at n=0A250239
- Number of (n+1) X (6+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.at n=7A251147