6375
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 11232
- Proper Divisor Sum (Aliquot Sum)
- 4857
- 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
- 3200
- Möbius Function
- 0
- Radical
- 255
- Omega Function (Ω)
- 5
- 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
- 199
- 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
- no
- Odd
- yes
Appears in sequences
- Number of partitions of floor(7n/2) into n nonnegative integers each no more than 7.at n=16A001979
- a(n) = n*(11*n+1)/2.at n=34A022269
- Duplicate of A022269.at n=33A026817
- Numbers having four 0's in base 5.at n=36A043352
- a(n) = T(n,n-5), array T as in A055807.at n=14A055810
- a(1) = 1; a(n) = smallest number such that the concatenation a(1)a(2)...a(n) is an n-th power.at n=2A061109
- Numbers k such that phi(k+1) - phi(k) = -d(k).at n=9A066172
- Numbers k such that k divides Sum_{i=1..k} gcd(k,i) = A018804(k).at n=37A066862
- Numbers k such that k = (sum of distinct prime factors of k)*(product of distinct prime factors of k).at n=31A068999
- Smallest integer >= 0 of the form x^3 - n^4.at n=19A070930
- Constant term of polynomial of degree n passing through the first n+1 consecutive prime-indexed primes.at n=10A082676
- Number of primes less than 10^n which do not contain the digit 8.at n=4A091642
- Numbers n that are the hypotenuse of exactly 10 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 10 ways.at n=8A097225
- a(n) = n_t(n) where t() = triangular numbers A000217.at n=49A122627
- Numbers k such that k and k+5 are 5-almost primes.at n=21A124942
- Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+137)^2 = y^2.at n=7A129544
- Numbers k such that the sum of the Carmichael lambda functions of the divisors is a proper divisor of k.at n=11A131492
- a(n) = 7^n mod 2^n.at n=13A138616
- 3 times 9-gonal (or nonagonal) numbers: a(n) = 3*n*(7*n-5)/2.at n=25A152759
- First of two consecutive numbers with at least one 3 in their prime signature.at n=30A176313