7856825 has 12 divisors (see below), whose sum is σ = 10079340. Its totient is φ = 6068160.

The previous prime is 7856819. The next prime is 7856843. The reversal of 7856825 is 5286587.

It can be written as a sum of positive squares in 6 ways, for example, as 609961 + 7246864 = 781^2 + 2692^2 .

It is not a de Polignac number, because 7856825 - 2¹⁸ = 7594681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4694 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (839945).

Almost surely, 2^7856825 is an apocalyptic number.

It is an amenable number.

7856825 is a deficient number, since it is larger than the sum of its proper divisors (2222515).

7856825 is a wasteful number, since it uses less digits than its factorization.

7856825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876 (or 10871 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 7856825 is about 2803.0028540835. The cubic root of 7856825 is about 198.7996856385.

The spelling of 7856825 in words is "seven million, eight hundred fifty-six thousand, eight hundred twenty-five".