diff --git a/django/db/backends/util.py b/django/db/backends/util.py
index 865508a057..3ed18adb37 100644
--- a/django/db/backends/util.py
+++ b/django/db/backends/util.py
@@ -92,7 +92,7 @@ def typecast_timestamp(s): # does NOT store time zone information
     else:
         microseconds = '0'
     return datetime.datetime(int(dates[0]), int(dates[1]), int(dates[2]),
-        int(times[0]), int(times[1]), int(seconds), int(float('.'+microseconds) * 1000000))
+        int(times[0]), int(times[1]), int(seconds), int((microseconds + '000000')[:6]))
 
 def typecast_boolean(s):
     if s is None: return None
diff --git a/tests/regressiontests/db_typecasts/tests.py b/tests/regressiontests/db_typecasts/tests.py
index f4b77fe3a6..8c71c8f809 100644
--- a/tests/regressiontests/db_typecasts/tests.py
+++ b/tests/regressiontests/db_typecasts/tests.py
@@ -35,6 +35,12 @@ TEST_CASES = {
         ('2005-08-11 8:50:30.9', datetime.datetime(2005, 8, 11, 8, 50, 30, 900000)),
         ('2005-08-11 8:50:30.312-05', datetime.datetime(2005, 8, 11, 8, 50, 30, 312000)),
         ('2005-08-11 8:50:30.312+02', datetime.datetime(2005, 8, 11, 8, 50, 30, 312000)),
+        # ticket 14453
+        ('2010-10-12 15:29:22.063202', datetime.datetime(2010, 10, 12, 15, 29, 22, 63202)),
+        ('2010-10-12 15:29:22.063202-03', datetime.datetime(2010, 10, 12, 15, 29, 22, 63202)),
+        ('2010-10-12 15:29:22.063202+04', datetime.datetime(2010, 10, 12, 15, 29, 22, 63202)),
+        ('2010-10-12 15:29:22.0632021', datetime.datetime(2010, 10, 12, 15, 29, 22, 63202)),
+        ('2010-10-12 15:29:22.0632029', datetime.datetime(2010, 10, 12, 15, 29, 22, 63202)),
     ),
     'typecast_boolean': (
         (None, None),
@@ -53,4 +59,4 @@ class DBTypeCasts(unittest.TestCase):
                 assert got == expected, "In %s: %r doesn't match %r. Got %r instead." % (k, inpt, expected, got)
 
 if __name__ == '__main__':
-    unittest.main()
\ No newline at end of file
+    unittest.main()