A hashrate of 1.42 EH/s, really?
A miner should not be correlated with a device. I can have 10 devices and I will still be a single miner from the perspective of the pool. I can have a mining farm with thousand devices and I can still look like a single miner to the pool.

Also note that a miner, in the above sense, is just a person that provides hashing power to a pool that runs a mining node; i.e. there are much less mining nodes.