Pandas while importing ignores 0 from the values if it starts with 0

Question

I've used pandas to import a csv file as below:

import pandas as pd
csv_input = pd.read_csv('Accounts_Input.csv')

but after importing, while checking the values it seems that it ignored the 0 from the values if it start with a 0 as below:

input_file  after_import
0897456129  897456129
8601009624  8601009624

Can u guys suggest any way to avoid this?