851056 has 20 divisors (see below), whose sum is σ = 1688632. Its totient is φ = 415296.

The previous prime is 851051. The next prime is 851057. The reversal of 851056 is 650158.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 851056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851051) by changing a digit.

851056 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 70 + ... + 1306.

2⁸⁵¹⁰⁵⁶ is an apocalyptic number.

851056 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

851056 is a deficient number, since it is larger than the sum of its proper divisors (837576).

851056 is a wasteful number, since it uses less digits than its factorization.

851056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 851056 is about 922.5269643756. The cubic root of 851056 is about 94.7660355341.

The spelling of 851056 in words is "eight hundred fifty-one thousand, fifty-six".