8652721 has 16 divisors (see below), whose sum is σ = 10902528. Its totient is φ = 6670800.

The previous prime is 8652703. The next prime is 8652731. The reversal of 8652721 is 1272568.

It is a cyclic number.

It is not a de Polignac number, because 8652721 - 2⁷ = 8652593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8652731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7386 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (681408).

Almost surely, 2^8652721 is an apocalyptic number.

It is an amenable number.

8652721 is a deficient number, since it is larger than the sum of its proper divisors (2249807).

8652721 is a wasteful number, since it uses less digits than its factorization.

8652721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 6720, while the sum is 31.

The square root of 8652721 is about 2941.5507814756. The cubic root of 8652721 is about 205.2977707170.

The spelling of 8652721 in words is "eight million, six hundred fifty-two thousand, seven hundred twenty-one".