842587 has 2 divisors, whose sum is σ = 842588. Its totient is φ = 842586.

The previous prime is 842581. The next prime is 842599. The reversal of 842587 is 785248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842587 - 2¹⁹ = 318299 is a prime.

It is not a weakly prime, because it can be changed into another prime (842581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421293 + 421294.

It is an arithmetic number, because the mean of its divisors is an integer number (421294).

2⁸⁴²⁵⁸⁷ is an apocalyptic number.

842587 is a deficient number, since it is larger than the sum of its proper divisors (1).

842587 is an equidigital number, since it uses as much as digits as its factorization.

842587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 34.

The square root of 842587 is about 917.9253782307. The cubic root of 842587 is about 94.4506428330.

The spelling of 842587 in words is "eight hundred forty-two thousand, five hundred eighty-seven".