855812 has 6 divisors (see below), whose sum is σ = 1497678. Its totient is φ = 427904.

The previous prime is 855787. The next prime is 855821. The reversal of 855812 is 218558.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 287296 = 754^2 + 536^2 .

It is an unprimeable number.

855812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106973 + ... + 106980.

It is an arithmetic number, because the mean of its divisors is an integer number (249613).

2⁸⁵⁵⁸¹² is an apocalyptic number.

It is an amenable number.

855812 is a deficient number, since it is larger than the sum of its proper divisors (641866).

855812 is a wasteful number, since it uses less digits than its factorization.

855812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213957 (or 213955 counting only the distinct ones).

The product of its digits is 3200, while the sum is 29.

The square root of 855812 is about 925.1010755588. The cubic root of 855812 is about 94.9422363527.

The spelling of 855812 in words is "eight hundred fifty-five thousand, eight hundred twelve".