def parse_numeric_string(s):

    if isinstance(s, int): s = str(s)

    amount = None
    currency = ''
    multiplier = 1.0

    for token in s.split(' '):

        token = token.lower()

        # Extract multipliers from their string names/abbrevs
        if token in ['million','m','mm']:
            multiplier = 1e6
        # ... or you could use a dict:
        # multiplier = {'million': 1e6, 'm': 1e6...}.get(token, 1.0)

        # Assume anything else is some string format of number/int/float/scientific
        try:
            token = token.replace(',', '')
            amount = float(token)
        except:
            pass # Process your parse failures...

    # Return a tuple, or whatever you prefer
    return (currency, amount * multiplier)

parse_numeric_string("$ 1,350,000")
parse_numeric_string("1.35 MM $")
parse_numeric_string("$ 1.35 M")
parse_numeric_string(1350000)

(?<=$ )([d,]+)

([d.]+)(?= MM $)

(?<=$ )([d.]+)(?= M)

([d]+)