8872721 has 8 divisors (see below), whose sum is σ = 10424064. Its totient is φ = 7445520.

The previous prime is 8872697. The next prime is 8872723. The reversal of 8872721 is 1272788.

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

It is a cyclic number.

It is not a de Polignac number, because 8872721 - 2¹⁰ = 8871697 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (8872723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30881 + ... + 31166.

It is an arithmetic number, because the mean of its divisors is an integer number (1303008).

Almost surely, 2^8872721 is an apocalyptic number.

It is an amenable number.

8872721 is a deficient number, since it is larger than the sum of its proper divisors (1551343).

8872721 is a wasteful number, since it uses less digits than its factorization.

8872721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62071.

The product of its digits is 12544, while the sum is 35.

The square root of 8872721 is about 2978.7112985316. The cubic root of 8872721 is about 207.0231640316.

The spelling of 8872721 in words is "eight million, eight hundred seventy-two thousand, seven hundred twenty-one".