6851825 has 12 divisors (see below), whose sum is σ = 8637468. Its totient is φ = 5390400.

The previous prime is 6851821. The next prime is 6851827. The reversal of 6851825 is 5281586.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 44944 + 6806881 = 212^2 + 2609^2 .

It is not a de Polignac number, because 6851825 - 2² = 6851821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6851821) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 722 + ... + 3771.

It is an arithmetic number, because the mean of its divisors is an integer number (719789).

Almost surely, 2^6851825 is an apocalyptic number.

It is an amenable number.

6851825 is a deficient number, since it is larger than the sum of its proper divisors (1785643).

6851825 is a wasteful number, since it uses less digits than its factorization.

6851825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 4559 counting only the distinct ones).

The product of its digits is 19200, while the sum is 35.

The square root of 6851825 is about 2617.5990907700. The cubic root of 6851825 is about 189.9337257312.

The spelling of 6851825 in words is "six million, eight hundred fifty-one thousand, eight hundred twenty-five".