9987245 has 8 divisors (see below), whose sum is σ = 12689784. Its totient is φ = 7519744.

The previous prime is 9987209. The next prime is 9987247. The reversal of 9987245 is 5427899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1261129 + 8726116 = 1123^2 + 2954^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9987245 - 2⁶ = 9987181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9987196 and 9987205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987247) 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, 58664 + ... + 58833.

It is an arithmetic number, because the mean of its divisors is an integer number (1586223).

Almost surely, 2^9987245 is an apocalyptic number.

It is an amenable number.

9987245 is a deficient number, since it is larger than the sum of its proper divisors (2702539).

9987245 is a wasteful number, since it uses less digits than its factorization.

9987245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117519.

The product of its digits is 181440, while the sum is 44.

The square root of 9987245 is about 3160.2602740914. The cubic root of 9987245 is about 215.3518306490.

The spelling of 9987245 in words is "nine million, nine hundred eighty-seven thousand, two hundred forty-five".