9721230 has 32 divisors (see below), whose sum is σ = 23442048. Its totient is φ = 2580000.

The previous prime is 9721199. The next prime is 9721241. The reversal of 9721230 is 321279.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9721230.

It is a congruent number.

It is an unprimeable number.

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, 6885 + ... + 8175.

It is an arithmetic number, because the mean of its divisors is an integer number (732564).

Almost surely, 2^9721230 is an apocalyptic number.

9721230 is an abundant number, since it is smaller than the sum of its proper divisors (13720818).

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

9721230 is a wasteful number, since it uses less digits than its factorization.

9721230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 9721230 is about 3117.8887087258. Note that the first 3 decimals coincide. The cubic root of 9721230 is about 213.4225999036.

The spelling of 9721230 in words is "nine million, seven hundred twenty-one thousand, two hundred thirty".