9871215 has 16 divisors (see below), whose sum is σ = 15842400. Its totient is φ = 5248512.

The previous prime is 9871189. The next prime is 9871217. The reversal of 9871215 is 5121789.

9871215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9871215 - 2¹² = 9867119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5331 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (990150).

Almost surely, 2^9871215 is an apocalyptic number.

9871215 is a deficient number, since it is larger than the sum of its proper divisors (5971185).

9871215 is a wasteful number, since it uses less digits than its factorization.

9871215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026.

The product of its digits is 5040, while the sum is 33.

The square root of 9871215 is about 3141.8489779109. The cubic root of 9871215 is about 214.5146071632.

The spelling of 9871215 in words is "nine million, eight hundred seventy-one thousand, two hundred fifteen".