7375
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
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9360
- Proper Divisor Sum (Aliquot Sum)
- 1985
- 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
- 5800
- Möbius Function
- 0
- Radical
- 295
- Omega Function (Ω)
- 4
- 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
- 44
- 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
- a(0) = 1, a(1) = 4, and a(n) = a(n-1) + a(n-2) for n >= 2.at n=17A000285
- Sum of (Gaussian) q-binomial coefficients for q=-10.at n=4A015174
- Number of ordered quadruples of integers from [ 1,n ] with no common factors between pairs.at n=35A015636
- Composite numbers whose prime factors contain no digits other than 5 and 9.at n=8A036321
- Numbers whose base-4 representation contains exactly two 0's and four 3's.at n=16A045075
- Hypotenuses for which there exist exactly 3 distinct integer triangles.at n=39A084647
- a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n).at n=14A086796
- Fibonacci sequence with initial values a(0) = 3 and a(1) = 1.at n=18A104449
- Numbers k such that the k-th and (k+1)-th primes have the same sum of squares of digits.at n=28A109182
- Start with 1 and repeatedly reverse the digits and add 42 to get the next term.at n=17A118075
- a(n) = floor(sqrt(pi(2^n))).at n=30A133498
- Starts with 2; has two properties: concatenation of its digits is same string as concatenation of digits of its first differences and sequence and first differences have no term in common. When there is a choice in choosing the next term in the first differences, choose the smallest number not yet present in either the sequence or its first differences.at n=36A139334
- Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1100-0111 pattern in any orientation.at n=10A146802
- Number of lines through at least 2 points of a 9 X n grid of points.at n=20A160849
- a(n) = n^3 mod (n-th prime squared).at n=25A167623
- Partial sums of (A006899, prefixed by a 1).at n=19A170804
- Twin natural nonprimes with nonprime number of prime factors.at n=25A171995
- Numbers k such that Mordell's equation y^2 = x^3 - k has exactly 8 integral solutions.at n=33A179168
- Half the number of nXnXn triangular binary arrays with no element equal to exactly half of its neighbors.at n=6A192331
- Sorted list of largest values in the quintuple (a,b,c,d,e) satisfying a^2 + b^2 + c^2 + d^2 + e^2 = a*b*c*d*e.at n=59A229240