9721371 has 16 divisors (see below), whose sum is σ = 14382720. Its totient is φ = 5790720.

The previous prime is 9721367. The next prime is 9721373. The reversal of 9721371 is 1731279.

It is not a de Polignac number, because 9721371 - 2² = 9721367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9721373) 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 15 ways as a sum of consecutive naturals, for example, 550 + ... + 4443.

It is an arithmetic number, because the mean of its divisors is an integer number (898920).

Almost surely, 2^9721371 is an apocalyptic number.

9721371 is a deficient number, since it is larger than the sum of its proper divisors (4661349).

9721371 is a wasteful number, since it uses less digits than its factorization.

9721371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066.

The product of its digits is 2646, while the sum is 30.

The square root of 9721371 is about 3117.9113200988. The cubic root of 9721371 is about 213.4236317498.

The spelling of 9721371 in words is "nine million, seven hundred twenty-one thousand, three hundred seventy-one".