8058721 has 6 divisors (see below), whose sum is σ = 8858066. Its totient is φ = 7326000.

The previous prime is 8058707. The next prime is 8058733. The reversal of 8058721 is 1278508.

It can be written as a sum of positive squares in only one way, i.e., 7623121 + 435600 = 2761^2 + 660^2 .

It is not a de Polignac number, because 8058721 - 2⁷ = 8058593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8058521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33180 + ... + 33421.

Almost surely, 2^8058721 is an apocalyptic number.

It is an amenable number.

8058721 is a deficient number, since it is larger than the sum of its proper divisors (799345).

8058721 is a wasteful number, since it uses less digits than its factorization.

8058721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66623 (or 66612 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 8058721 is about 2838.7886501112. The cubic root of 8058721 is about 200.4881492489.

It can be divided in two parts, 80587 and 21, that added together give a palindrome (80608).

The spelling of 8058721 in words is "eight million, fifty-eight thousand, seven hundred twenty-one".