855100 has 36 divisors (see below), whose sum is σ = 1968624. Its totient is φ = 321280.

The previous prime is 855089. The next prime is 855119. The reversal of 855100 is 1558.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1449 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2⁸⁵⁵¹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984312).

855100 is an abundant number, since it is smaller than the sum of its proper divisors (1113524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855100 is a wasteful number, since it uses less digits than its factorization.

855100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 855100 is about 924.7161726714. The cubic root of 855100 is about 94.9158997167.

Adding to 855100 its reverse (1558), we get a palindrome (856658).

The spelling of 855100 in words is "eight hundred fifty-five thousand, one hundred".