855523 has 6 divisors (see below), whose sum is σ = 876044. Its totient is φ = 835296.

The previous prime is 855521. The next prime is 855527. The reversal of 855523 is 325558.

It is not a de Polignac number, because 855523 - 2¹ = 855521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 855491 and 855500.

It is not an unprimeable number, because it can be changed into a prime (855521) 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 5 ways as a sum of consecutive naturals, for example, 7515 + ... + 7627.

2⁸⁵⁵⁵²³ is an apocalyptic number.

855523 is a deficient number, since it is larger than the sum of its proper divisors (20521).

855523 is an equidigital number, since it uses as much as digits as its factorization.

855523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 180 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 855523 is about 924.9448632216. The cubic root of 855523 is about 94.9315481037.

It can be divided in two parts, 855 and 523, that added together give a triangular number (1378 = T₅₂).

The spelling of 855523 in words is "eight hundred fifty-five thousand, five hundred twenty-three".