855549 has 8 divisors (see below), whose sum is σ = 1267520. Its totient is φ = 570348.

The previous prime is 855527. The next prime is 855581. The reversal of 855549 is 945558.

It is a happy number.

It is not a de Polignac number, because 855549 - 2⁸ = 855293 is a prime.

It is a Duffinian number.

855549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15817 + ... + 15870.

It is an arithmetic number, because the mean of its divisors is an integer number (158440).

2⁸⁵⁵⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

855549 is a deficient number, since it is larger than the sum of its proper divisors (411971).

855549 is a wasteful number, since it uses less digits than its factorization.

855549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31696 (or 31690 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 855549 is about 924.9589180066. The cubic root of 855549 is about 94.9325097748.

Subtracting 855549 from its reverse (945558), we obtain a palindrome (90009).

The spelling of 855549 in words is "eight hundred fifty-five thousand, five hundred forty-nine".