It's about twenty times as heavy as The Space Shuttle
In other words, the weight of The Space Shuttle is 0.045 times 1,590,000 kilograms.(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 71,000 kilograms. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 19,737 kg.
It's about one-seventy-fifth as heavy as The CN Tower
In other words, 1,590,000 kilograms is 0.013485 times the weight of The CN Tower, and the weight of The CN Tower is 74.1560 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 117,910,000 kilograms. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about one-one-hundred-fiftieth as heavy as The Sears Tower
In other words, 1,590,000 kilograms is 0.007879 times the weight of The Sears Tower, and the weight of The Sears Tower is 126.90 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 201,800,000 kilograms. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.
It's about 150 times as heavy as an Anchor of a Cruise Ship
In other words, 1,590,000 kilograms is 141 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 0.00709 times that amount.(for QE2 forward anchor, a.k.a. RMS Queen Elizabeth 2)
Each of the forward anchors of the RMS Queen Elizabeth 2 weighs 11,300 kg. The anchor of the QE2 now sits in front of the Holyrood Church in Southampton, England, United Kingdom, along a pedestrian tourist route known as "the QE2 mile."
It's about one-two-hundredth as heavy as The Empire State Building
In other words, 1,590,000 kilograms is 0.0048 times the weight of The Empire State Building, and the weight of The Empire State Building is 208 times that amount.(New York City, New York)
The Empire State Building weighs approximately 331,000,000 kilograms. About 4% of the building's weight is its 6,000 cu. m (200,000 cu. ft) of limestone façade.
It's about 250 times as heavy as a Tyrannosaurus rex
In other words, the weight of a Tyrannosaurus rex is 0.004 times 1,590,000 kilograms.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 6,400 kilograms while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.
It's about 250 times as heavy as an Elephant
In other words, the weight of an Elephant is 0.0038 times 1,590,000 kilograms.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 6,100 kg. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 4,000 kg