856487 has 2 divisors, whose sum is σ = 856488. Its totient is φ = 856486.

The previous prime is 856483. The next prime is 856507. The reversal of 856487 is 784658.

856487 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 not a de Polignac number, because 856487 - 2² = 856483 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428243 + 428244.

It is an arithmetic number, because the mean of its divisors is an integer number (428244).

2⁸⁵⁶⁴⁸⁷ is an apocalyptic number.

856487 is a deficient number, since it is larger than the sum of its proper divisors (1).

856487 is an equidigital number, since it uses as much as digits as its factorization.

856487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 856487 is about 925.4658286506. The cubic root of 856487 is about 94.9671908864.

The spelling of 856487 in words is "eight hundred fifty-six thousand, four hundred eighty-seven".