851356 has 18 divisors (see below), whose sum is σ = 1638560. Its totient is φ = 386760.

The previous prime is 851351. The next prime is 851359. The reversal of 851356 is 653158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851351) by changing a digit.

851356 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396 + ... + 1363.

2⁸⁵¹³⁵⁶ is an apocalyptic number.

It is an amenable number.

851356 is a deficient number, since it is larger than the sum of its proper divisors (787204).

851356 is a wasteful number, since it uses less digits than its factorization.

851356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1772 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 851356 is about 922.6895469225. The cubic root of 851356 is about 94.7771693376. Note that the first 3 decimals are identical.

It can be divided in two parts, 85 and 1356, that added together give a palindrome (1441).

The spelling of 851356 in words is "eight hundred fifty-one thousand, three hundred fifty-six".