9945625 has 10 divisors (see below), whose sum is σ = 12428834. Its totient is φ = 7956000.

The previous prime is 9945619. The next prime is 9945631. The reversal of 9945625 is 5265499.

It is an interprime number because it is at equal distance from previous prime (9945619) and next prime (9945631).

It can be written as a sum of positive squares in 5 ways, for example, as 2350089 + 7595536 = 1533^2 + 2756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9945625 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 7332 + ... + 8581.

Almost surely, 2^9945625 is an apocalyptic number.

It is an amenable number.

9945625 is a deficient number, since it is larger than the sum of its proper divisors (2483209).

9945625 is an equidigital number, since it uses as much as digits as its factorization.

9945625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15933 (or 15918 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 9945625 is about 3153.6684987487. The cubic root of 9945625 is about 215.0522678043.

The spelling of 9945625 in words is "nine million, nine hundred forty-five thousand, six hundred twenty-five".