8178125 has 12 divisors (see below), whose sum is σ = 10225908. Its totient is φ = 6540000.

The previous prime is 8178109. The next prime is 8178143. The reversal of 8178125 is 5218718.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4418404 + 3759721 = 2102^2 + 1939^2 .

It is not a de Polignac number, because 8178125 - 2⁴ = 8178109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8178091 and 8178100.

It is a congruent number.

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, 1817 + ... + 4433.

It is an arithmetic number, because the mean of its divisors is an integer number (852159).

Almost surely, 2^8178125 is an apocalyptic number.

It is an amenable number.

8178125 is a deficient number, since it is larger than the sum of its proper divisors (2047783).

8178125 is an frugal number, since it uses more digits than its factorization.

8178125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642 (or 2622 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 8178125 is about 2859.7421212410. The cubic root of 8178125 is about 201.4734924400.

The spelling of 8178125 in words is "eight million, one hundred seventy-eight thousand, one hundred twenty-five".