6811925 has 6 divisors (see below), whose sum is σ = 8446818. Its totient is φ = 5449520.

The previous prime is 6811921. The next prime is 6811939. The reversal of 6811925 is 5291186.

It can be written as a sum of positive squares in 3 ways, for example, as 1387684 + 5424241 = 1178^2 + 2329^2 .

It is not a de Polignac number, because 6811925 - 2² = 6811921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6811891 and 6811900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811921) by changing a digit.

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, 136214 + ... + 136263.

It is an arithmetic number, because the mean of its divisors is an integer number (1407803).

Almost surely, 2^6811925 is an apocalyptic number.

It is an amenable number.

6811925 is a deficient number, since it is larger than the sum of its proper divisors (1634893).

6811925 is a wasteful number, since it uses less digits than its factorization.

6811925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272487 (or 272482 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 6811925 is about 2609.9664748805. The cubic root of 6811925 is about 189.5643295634.

The spelling of 6811925 in words is "six million, eight hundred eleven thousand, nine hundred twenty-five".