It's about 400 times as heavy as a Hippopotamus
In other words, 1,590,000 kilograms is 424 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.00236 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 3,000 to 4,500 kg. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about one-five-hundredth as heavy as The Golden Gate Bridge
In other words, 1,590,000 kilograms is 0.00198 times the weight of The Golden Gate Bridge, and the weight of The Golden Gate Bridge is 505 times that amount.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 805,000,000 kilograms. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.
It's about 600 times as heavy as The Tongue of a Blue Whale
In other words, 1,590,000 kilograms is 590 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 0.0017 times that amount.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 2,700 kilograms. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about 750 times as heavy as a Rhinoceros
In other words, the weight of a Rhinoceros is 0.0013 times 1,590,000 kilograms.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 1,400 and 2,800 kg. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about 800 times as heavy as a Giraffe
In other words, 1,590,000 kilograms is 824 times the weight of a Giraffe, and the weight of a Giraffe is 0.00121 times that amount.(Giraffa camelopardalis reticulata) (adult, male, maximum of range)
An adult, male giraffe can weigh up to 1,930 kg. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day.
It's about 950 times as heavy as a Car
It's about 2,500 times as heavy as a Cow
In other words, the weight of a Cow is 0.00043 times 1,590,000 kilograms.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 680 kg. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.