Is the sum of 2007 consecutive natural numbers odd or even?

Is the sum of 2007 consecutive natural numbers odd or even?

The sum of 2007 consecutive natural numbers may be even or odd
(1 + 2007) * 2007 / 2 = 2015028, continuous numbers start from odd numbers and the sum is even,
(2 + 2008) * 2007 / 2 = 2017035, a continuous number starts from an even number, and the sum is an odd number