```
In [1]:
```def reverse(s):
"""
Return the reverse of string 's'.
"""
return s[::-1]
def is_palindrome(s):
return s == reverse(s)
def binary_str(n):
"""
Reference https://stackoverflow.com/questions/699866/python-int-to-binary
"""
return "{0:b}".format(n)

```
In [2]:
```s = 0
for i in range(1000000):
if is_palindrome(str(i)) and is_palindrome(binary_str(i)):
s += i
print("Sum of all numbers under 1000000 that is palindromic in base 10 and base 2 is", s)

```
```