851120 has 20 divisors (see below), whose sum is σ = 1979040. Its totient is φ = 340416.

The previous prime is 851117. The next prime is 851131. The reversal of 851120 is 21158.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 5240 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (98952).

2⁸⁵¹¹²⁰ is an apocalyptic number.

851120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

851120 is an abundant number, since it is smaller than the sum of its proper divisors (1127920).

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

851120 is a wasteful number, since it uses less digits than its factorization.

851120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652 (or 10646 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 851120 is about 922.5616510564. The cubic root of 851120 is about 94.7684109651.

Adding to 851120 its reverse (21158), we get a palindrome (872278).

The spelling of 851120 in words is "eight hundred fifty-one thousand, one hundred twenty".