#include <bits/stdc++.h>
using namespace std;

#define int long long
#define double long double
#define endl "\n"

int mod = 6421;

int ksm(int a, int b)
{
	int c = 1;
	while (b)
	{
		if (b % 2)
			c = c * a % mod;
		b /= 2;
		a = a * a % mod;
	}
	return c;
}

void solve()
{
	int n = 20240601;
	
	map<int, int> mp;
	for (int i = 1; i <= n; i++)
		mp[ksm(i % mod, i)]++;
	
	int ans = mp[0] * (mp[0] - 1) / 2;
	for (int i = 1; i < mod - i; i++)
		ans += mp[i] * mp[mod - i];
	cout << ans << endl;
}

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cout << fixed << setprecision(10);
	
	int t = 1;
	// cin >> t;
	while (t--)
		solve();
	
	return 0;
}