import sys
input=sys.stdin.readline
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    mod=10**9+7
    A=I()
    
    flag=0
    M=10**6
    
    rem=6
    for d in range(3,M):
        if (A-rem)%d==0:
            flag=1
            break
        rem+=(d+1)
        
    if flag==1:
        print("YES")
    else:
        print("NO")
        



main()