1590
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
- 16
- Divisor Sum
- 3888
- Proper Divisor Sum (Aliquot Sum)
- 2298
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 416
- Möbius Function
- 1
- Radical
- 1590
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 104
- 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
- yes
- Odd
- no
Appears in sequences
- Denominators of Bernoulli numbers B_{2n}.at n=52A002445
- Denominators of Bernoulli numbers B_{2n}.at n=26A002445
- From a definite integral.at n=8A002570
- Numbers that are the sum of 8 positive 6th powers.at n=19A003364
- a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.at n=14A006000
- Numbers not of form p + 2^x + 2^y.at n=32A006286
- Denominators of Bernoulli numbers B_0, B_1, B_2, B_4, B_6, ...at n=27A006954
- Coordination sequence T2 for Zeolite Code MEI.at n=29A008147
- Number of equilateral triangles formed by triples of points taken from a hexagonal chunk of side n in the hexagonal lattice.at n=5A008893
- a(n) is the concatenation of n and 6n.at n=14A009440
- Coordination sequence T2 for Zeolite Code AFX.at n=30A009865
- a(1) = 2; a(n+1) = a(n)-th composite.at n=20A022450
- Expansion of Product_{m>=1} (1+q^m)^(-15).at n=4A022610
- Number of terms in 6th derivative of a function composed with itself n times.at n=7A022816
- Number of terms in n-th derivative of a function composed with itself 8 times.at n=6A024208
- Index of 9^n within the sequence of the numbers of the form 2^i*9^j.at n=31A025734
- Index of 9^n within the sequence of the numbers of the form 6^i*9^j.at n=50A025736
- Number of distinct products i*j*k with 1 <= i < j < k <= n.at n=29A027430
- Denominator of Bernoulli number B_n.at n=52A027642
- Denominator of Sum_{p prime, p-1 divides n} 1/p.at n=51A027760