#include <bits/stdc++.h>
#define INT long long int
#define M (INT)(6e18)
using namespace std;
INT n;
int main()
{
    freopen(".11.in","r",stdin);
    freopen(".11.out","w",stdout);
    ios::sync_with_stdio(false);
    cin>>n;
    INT l = n*(n-1)/__gcd(n, n-1);
    cout<<((l*(n+1))/__gcd(n+1, l))<<endl;
}
/*
5
a b
b c
c d
d e

5
c d
d e
a b
b c

6
a b
c b
d c
e d
d f

6
d f
a b
c b
e d
d c

9
a b
a c
b f
b g
c d
c e
d h
d i

10
a d
a e
d j
f e
i f
f h
b h
c h
b g

26
a b
a c
b d
b e
c f
c g
d h
d i
e j
e k
g l
g m
h r
h s
m n
m o
s t
s u
o p
o q
u v
v w
w x
x y
x z

26
a b
b l
b c
c m
c d
d n
d e
e o
e f
f p
f g
g q
q v
v w
w x
g h
h r
r y
y z
h i
i s
i j
j t
j k
k u

26
a b
a c
b d
b e
c f
c g
d h
d i
e j
e k
f l
f m
g n
g o
h p
h q
i r
i s
j t
j u
k v
k w
l x
l y
m z

1

*/