8720125 has 8 divisors (see below), whose sum is σ = 10882872. Its totient is φ = 6976000.

The previous prime is 8720119. The next prime is 8720137. The reversal of 8720125 is 5210278.

8720125 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 41209 + 8678916 = 203^2 + 2946^2 .

It is not a de Polignac number, because 8720125 - 2¹³ = 8711933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8720125.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34756 + ... + 35005.

It is an arithmetic number, because the mean of its divisors is an integer number (1360359).

Almost surely, 2^8720125 is an apocalyptic number.

It is an amenable number.

8720125 is a deficient number, since it is larger than the sum of its proper divisors (2162747).

8720125 is an equidigital number, since it uses as much as digits as its factorization.

8720125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69776 (or 69766 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 8720125 is about 2952.9857771415. The cubic root of 8720125 is about 205.8294768173.

The spelling of 8720125 in words is "eight million, seven hundred twenty thousand, one hundred twenty-five".