There is a four-digit number, the number in the thousands place is 3, the numbers in the other numbers are three consecutive numbers, and the sum of the three numbers is exactly 15. What could this four-digit number be?
有一个四位数，千位上的数是3，其他数位上的数是连续的三个数，而且三个数加起来的和正好是15．这个四位数可能是多少？
<result>3_456</result>