9872505 has 12 divisors (see below), whose sum is σ = 17112420. Its totient is φ = 5265312.

The previous prime is 9872501. The next prime is 9872509. The reversal of 9872505 is 5052789.

9872505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9872501) and next prime (9872509).

It can be written as a sum of positive squares in 2 ways, for example, as 4782969 + 5089536 = 2187^2 + 2256^2 .

It is not a de Polignac number, because 9872505 - 2² = 9872501 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 9872505.

It is not an unprimeable number, because it can be changed into a prime (9872501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109650 + ... + 109739.

It is an arithmetic number, because the mean of its divisors is an integer number (1426035).

Almost surely, 2^9872505 is an apocalyptic number.

It is an amenable number.

9872505 is a deficient number, since it is larger than the sum of its proper divisors (7239915).

9872505 is a wasteful number, since it uses less digits than its factorization.

9872505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219400 (or 219397 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 9872505 is about 3142.0542643309. The cubic root of 9872505 is about 214.5239512271.

The spelling of 9872505 in words is "nine million, eight hundred seventy-two thousand, five hundred five".