855387 has 16 divisors (see below), whose sum is σ = 1365280. Its totient is φ = 526176.

The previous prime is 855377. The next prime is 855391. The reversal of 855387 is 783558.

It is a happy number.

It is not a de Polignac number, because 855387 - 2⁸ = 855131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855307) 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 15 ways as a sum of consecutive naturals, for example, 868 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (85330).

2⁸⁵⁵³⁸⁷ is an apocalyptic number.

855387 is a deficient number, since it is larger than the sum of its proper divisors (509893).

855387 is a wasteful number, since it uses less digits than its factorization.

855387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459 (or 2453 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 855387 is about 924.8713424039. The cubic root of 855387 is about 94.9265175065.

The spelling of 855387 in words is "eight hundred fifty-five thousand, three hundred eighty-seven".