8372521 has 8 divisors (see below), whose sum is σ = 8946080. Its totient is φ = 7812288.

The previous prime is 8372519. The next prime is 8372543. The reversal of 8372521 is 1252738.

8372521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8372521 - 2¹ = 8372519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8372521.

It is not an unprimeable number, because it can be changed into a prime (8372501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2016 + ... + 4561.

It is an arithmetic number, because the mean of its divisors is an integer number (1118260).

Almost surely, 2^8372521 is an apocalyptic number.

It is an amenable number.

8372521 is a deficient number, since it is larger than the sum of its proper divisors (573559).

8372521 is a wasteful number, since it uses less digits than its factorization.

8372521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663.

The product of its digits is 3360, while the sum is 28.

The square root of 8372521 is about 2893.5308880328. The cubic root of 8372521 is about 203.0573660743.

The spelling of 8372521 in words is "eight million, three hundred seventy-two thousand, five hundred twenty-one".