855143 has 2 divisors, whose sum is σ = 855144. Its totient is φ = 855142.

The previous prime is 855131. The next prime is 855187. The reversal of 855143 is 341558.

855143 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 855143 - 2⁶ = 855079 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427571 + 427572.

It is an arithmetic number, because the mean of its divisors is an integer number (427572).

2⁸⁵⁵¹⁴³ is an apocalyptic number.

855143 is a deficient number, since it is larger than the sum of its proper divisors (1).

855143 is an equidigital number, since it uses as much as digits as its factorization.

855143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 855143 is about 924.7394227565. The cubic root of 855143 is about 94.9174906867.

It can be divided in two parts, 855 and 143, that multiplied together give a triangular number (122265 = T₄₉₄).

The spelling of 855143 in words is "eight hundred fifty-five thousand, one hundred forty-three".