6855845 has 8 divisors (see below), whose sum is σ = 8711064. Its totient is φ = 5161984.

The previous prime is 6855829. The next prime is 6855869. The reversal of 6855845 is 5485586.

6855845 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3928324 + 2927521 = 1982^2 + 1711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6855845 - 2⁴ = 6855829 is a prime.

It is a super-2 number, since 2×6855845² = 94005221328050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 40244 + ... + 40413.

It is an arithmetic number, because the mean of its divisors is an integer number (1088883).

Almost surely, 2^6855845 is an apocalyptic number.

It is an amenable number.

6855845 is a deficient number, since it is larger than the sum of its proper divisors (1855219).

6855845 is a wasteful number, since it uses less digits than its factorization.

6855845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80679.

The product of its digits is 192000, while the sum is 41.

The square root of 6855845 is about 2618.3668574132. The cubic root of 6855845 is about 189.9708634915.

The spelling of 6855845 in words is "six million, eight hundred fifty-five thousand, eight hundred forty-five".