9872015 has 4 divisors (see below), whose sum is σ = 11846424. Its totient is φ = 7897608.

The previous prime is 9872011. The next prime is 9872017. The reversal of 9872015 is 5102789.

9872015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9872015 - 2² = 9872011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987197 + ... + 987206.

It is an arithmetic number, because the mean of its divisors is an integer number (2961606).

Almost surely, 2^9872015 is an apocalyptic number.

9872015 is a deficient number, since it is larger than the sum of its proper divisors (1974409).

9872015 is a wasteful number, since it uses less digits than its factorization.

9872015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974408.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 9872015 is about 3141.9762888984. The cubic root of 9872015 is about 214.5204020274.

The spelling of 9872015 in words is "nine million, eight hundred seventy-two thousand, fifteen".