851105 has 24 divisors (see below), whose sum is σ = 1178880. Its totient is φ = 587520.

The previous prime is 851093. The next prime is 851113. The reversal of 851105 is 501158.

It is not a de Polignac number, because 851105 - 2⁶ = 851041 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 27440 + ... + 27470.

It is an arithmetic number, because the mean of its divisors is an integer number (49120).

2⁸⁵¹¹⁰⁵ is an apocalyptic number.

851105 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

851105 is a deficient number, since it is larger than the sum of its proper divisors (327775).

851105 is a wasteful number, since it uses less digits than its factorization.

851105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 851105 is about 922.5535214826. The cubic root of 851105 is about 94.7678542341.

The spelling of 851105 in words is "eight hundred fifty-one thousand, one hundred five".