5901
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9024
- Proper Divisor Sum (Aliquot Sum)
- 3123
- 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
- 5901
- 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
- 142
- 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
- a(n) = round(n*phi^14), where phi is the golden ratio, A001622.at n=7A004949
- a(n) = ceiling(n*phi^14), where phi is the golden ratio, A001622.at n=7A004969
- Triangle of numbers associated with Genocchi numbers.at n=22A014784
- Triangle of numbers associated with Genocchi numbers.at n=26A014784
- Pseudoprimes to base 62.at n=39A020190
- Expansion of 1/((1-2x)(1-3x)(1-4x)(1-5x)).at n=4A025211
- Number of different sets ("cut sets") of triangles a regular (n+2)-gon can be dissected into; two triangulations of an (n+2)-gon are equal if all numbers of congruent triangles coincide.at n=16A033961
- Sorted entries in triangle in A014784.at n=12A035003
- Positive numbers having the same set of digits in base 6 and base 8.at n=35A037435
- Numbers m such that there are precisely 3 groups of order m.at n=28A055561
- Maximal number of 132 patterns in a permutation of 1,2,...,n.at n=42A061061
- Self-convolution of A086582; the first 2^n terms of this sequence gives the 2^n terms that follow the 2^n-th term of A086582.at n=36A086583
- Values of k such that floor(k*tanh(Pi)) = floor((k+1) tanh(Pi)).at n=21A096613
- Indices of primes in sequence defined by A(0) = 29, A(n) = 10*A(n-1) - 41 for n > 0.at n=7A101960
- Second column of triangle A014784.at n=6A102078
- phi(n) + n is a cube.at n=23A114074
- Nonprimes k such that 7^k == 7 (mod k).at n=31A122784
- Numbers k for which 2*k-1, 4*k-1 and 8*k-1 are primes.at n=46A124493
- Triangle read by rows: matrix product of the Stirling numbers of the second kind with the binomial coefficients.at n=32A126351
- a(n) = (7*n^2 + 15*n + 2) / 2.at n=40A131874