142391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is a Sophie Germain prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142391.
2142391 is an apocalyptic number.
142391 is an equidigital number, since it uses as much as digits as its factorization.
142391 is an odious number, because the sum of its binary digits is odd.
The square root of 142391 is about 377.3473201177. The cubic root of 142391 is about 52.2188752612.
The spelling of 142391 in words is "one hundred forty-two thousand, three hundred ninety-one".