855189 has 6 divisors (see below), whose sum is σ = 1235286. Its totient is φ = 570120.

The previous prime is 855187. The next prime is 855191. The reversal of 855189 is 981558.

It is an interprime number because it is at equal distance from previous prime (855187) and next prime (855191).

It can be written as a sum of positive squares in only one way, i.e., 736164 + 119025 = 858^2 + 345^2 .

It is not a de Polignac number, because 855189 - 2¹ = 855187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855187) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47502 + ... + 47519.

It is an arithmetic number, because the mean of its divisors is an integer number (205881).

2⁸⁵⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

855189 is a deficient number, since it is larger than the sum of its proper divisors (380097).

855189 is a wasteful number, since it uses less digits than its factorization.

855189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95027 (or 95024 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 855189 is about 924.7642942934. The cubic root of 855189 is about 94.9191925955.

The spelling of 855189 in words is "eight hundred fifty-five thousand, one hundred eighty-nine".