855187 has 2 divisors, whose sum is σ = 855188. Its totient is φ = 855186.

The previous prime is 855143. The next prime is 855191. The reversal of 855187 is 781558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855187 - 2⁷ = 855059 is a prime.

It is not a weakly prime, because it can be changed into another prime (855787) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427593 + 427594.

It is an arithmetic number, because the mean of its divisors is an integer number (427594).

2⁸⁵⁵¹⁸⁷ is an apocalyptic number.

855187 is a deficient number, since it is larger than the sum of its proper divisors (1).

855187 is an equidigital number, since it uses as much as digits as its factorization.

855187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 34.

The square root of 855187 is about 924.7632129362. The cubic root of 855187 is about 94.9191186008.

The spelling of 855187 in words is "eight hundred fifty-five thousand, one hundred eighty-seven".