9871272 has 48 divisors (see below), whose sum is σ = 27125280. Its totient is φ = 3242400.

The previous prime is 9871259. The next prime is 9871289. The reversal of 9871272 is 2721789.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4147 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (565110).

Almost surely, 2^9871272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9871272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13562640).

9871272 is an abundant number, since it is smaller than the sum of its proper divisors (17254008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9871272 is a wasteful number, since it uses less digits than its factorization.

9871272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014 (or 2007 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 9871272 is about 3141.8580489895. The cubic root of 9871272 is about 214.5150200576.

The spelling of 9871272 in words is "nine million, eight hundred seventy-one thousand, two hundred seventy-two".