840587 has 6 divisors (see below), whose sum is σ = 924084. Its totient is φ = 764060.

The previous prime is 840571. The next prime is 840589. The reversal of 840587 is 785048.

It is not a de Polignac number, because 840587 - 2⁴ = 840571 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840587.

It is not an unprimeable number, because it can be changed into a prime (840589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3353 + ... + 3594.

It is an arithmetic number, because the mean of its divisors is an integer number (154014).

2⁸⁴⁰⁵⁸⁷ is an apocalyptic number.

840587 is a deficient number, since it is larger than the sum of its proper divisors (83497).

840587 is a wasteful number, since it uses less digits than its factorization.

840587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969 (or 6958 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 840587 is about 916.8353178189. The cubic root of 840587 is about 94.3758529520.

The spelling of 840587 in words is "eight hundred forty thousand, five hundred eighty-seven".