9721536 has 56 divisors (see below), whose sum is σ = 28065984. Its totient is φ = 2945280.

The previous prime is 9721529. The next prime is 9721561. The reversal of 9721536 is 6351279.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 9721497 and 9721506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190 + ... + 4413.

Almost surely, 2^9721536 is an apocalyptic number.

9721536 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9721536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14032992).

9721536 is an abundant number, since it is smaller than the sum of its proper divisors (18344448).

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

9721536 is a wasteful number, since it uses less digits than its factorization.

9721536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629 (or 4619 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 9721536 is about 3117.9377800078. The cubic root of 9721536 is about 213.4248392166.

The spelling of 9721536 in words is "nine million, seven hundred twenty-one thousand, five hundred thirty-six".