9721132 has 12 divisors (see below), whose sum is σ = 17108280. Its totient is φ = 4833056.

The previous prime is 9721123. The next prime is 9721133. The reversal of 9721132 is 2311279.

It is a super-2 number, since 2×9721132² = 189000814722848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9721097 and 9721106.

It is not an unprimeable number, because it can be changed into a prime (9721133) 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, 6073 + ... + 7504.

It is an arithmetic number, because the mean of its divisors is an integer number (1425690).

Almost surely, 2^9721132 is an apocalyptic number.

It is an amenable number.

9721132 is a deficient number, since it is larger than the sum of its proper divisors (7387148).

9721132 is a wasteful number, since it uses less digits than its factorization.

9721132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13760 (or 13758 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 9721132 is about 3117.8729929232. The cubic root of 9721132 is about 213.4218827281.

The spelling of 9721132 in words is "nine million, seven hundred twenty-one thousand, one hundred thirty-two".