4495
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5760
- Proper Divisor Sum (Aliquot Sum)
- 1265
- 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
- 3360
- Möbius Function
- -1
- Radical
- 4495
- 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
- yes
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 77
- 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
- no
- Odd
- yes
Appears in sequences
- Tetrahedral (or triangular pyramidal) numbers: a(n) = C(n+2,3) = n*(n+1)*(n+2)/6.at n=29A000292
- a(n) = 1^2 + 3^2 + 5^2 + 7^2 + ... + (2*n-1)^2 = n*(4*n^2 - 1)/3.at n=15A000447
- Numbers k such that x^k + x + 1 is irreducible over GF(2).at n=25A002475
- Pseudoprimes to base 6.at n=18A005937
- The generalized Conway-Guy sequence w^{3}.at n=14A006757
- Coordination sequence T3 for Zeolite Code MEL.at n=43A008152
- Binomial coefficient C(31,n).at n=3A010947
- Binomial coefficient C(31,n).at n=28A010947
- Binomial coefficient C(n,28).at n=3A010981
- Odd tetrahedral numbers: a(n) = (4*n+1)*(4*n+2)*(4*n+3)/6.at n=7A015219
- Number of partitions of n into distinct parts, none being 5.at n=56A015750
- Coordination sequence T8 for Zeolite Code TER.at n=45A016440
- Pseudoprimes to base 36.at n=35A020164
- Pseudoprimes to base 94.at n=39A020222
- Strong pseudoprimes to base 36.at n=12A020262
- Binomial coefficients: C(n,k), 3 <= k <= n-3, sorted, duplicates removed.at n=47A024755
- a(n) = A027170(2n, n-2).at n=4A027174
- Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 24 (most significant digit on right and removing all least significant zeros before concatenation).at n=8A029541
- (prime(n)-5)(prime(n)-7)(prime(n)-9)/48.at n=16A030002
- Lucky numbers with size of gaps equal to 14 (lower terms).at n=20A031896