9720125 has 8 divisors (see below), whose sum is σ = 12130872. Its totient is φ = 7776000.

The previous prime is 9720121. The next prime is 9720149. The reversal of 9720125 is 5210279.

9720125 = 59² + 60² + ... + 308².

It can be written as a sum of positive squares in 4 ways, for example, as 994009 + 8726116 = 997^2 + 2954^2 .

It is not a de Polignac number, because 9720125 - 2² = 9720121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9720094 and 9720103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720121) 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 7 ways as a sum of consecutive naturals, for example, 38756 + ... + 39005.

It is an arithmetic number, because the mean of its divisors is an integer number (1516359).

Almost surely, 2^9720125 is an apocalyptic number.

It is an amenable number.

9720125 is a deficient number, since it is larger than the sum of its proper divisors (2410747).

9720125 is an equidigital number, since it uses as much as digits as its factorization.

9720125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77776 (or 77766 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 9720125 is about 3117.7115004439. The cubic root of 9720125 is about 213.4145131043.

The spelling of 9720125 in words is "nine million, seven hundred twenty thousand, one hundred twenty-five".