842087 has 2 divisors, whose sum is σ = 842088. Its totient is φ = 842086.

The previous prime is 842081. The next prime is 842089. The reversal of 842087 is 780248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842087 - 2⁴ = 842071 is a prime.

It is a super-2 number, since 2×842087² = 1418221031138, which contains 22 as substring.

Together with 842089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421043 + 421044.

It is an arithmetic number, because the mean of its divisors is an integer number (421044).

2⁸⁴²⁰⁸⁷ is an apocalyptic number.

842087 is a deficient number, since it is larger than the sum of its proper divisors (1).

842087 is an equidigital number, since it uses as much as digits as its factorization.

842087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 842087 is about 917.6529845208. The cubic root of 842087 is about 94.4319564675.

The spelling of 842087 in words is "eight hundred forty-two thousand, eighty-seven".