9072321 has 8 divisors (see below), whose sum is σ = 12149280. Its totient is φ = 6021792.

The previous prime is 9072317. The next prime is 9072337. The reversal of 9072321 is 1232709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9072321 - 2² = 9072317 is a prime.

It is an alternating number because its digits alternate between odd and even.

9072321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9072291 and 9072300.

It is not an unprimeable number, because it can be changed into a prime (9072311) 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 7 ways as a sum of consecutive naturals, for example, 5791 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (1518660).

Almost surely, 2^9072321 is an apocalyptic number.

It is an amenable number.

9072321 is a deficient number, since it is larger than the sum of its proper divisors (3076959).

9072321 is a wasteful number, since it uses less digits than its factorization.

9072321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13215.

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

The square root of 9072321 is about 3012.0293823268. The cubic root of 9072321 is about 208.5640585508.

The spelling of 9072321 in words is "nine million, seventy-two thousand, three hundred twenty-one".