8449521 has 4 divisors (see below), whose sum is σ = 11266032. Its totient is φ = 5633012.

The previous prime is 8449517. The next prime is 8449523. The reversal of 8449521 is 1259448.

8449521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8449521 - 2² = 8449517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8449523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408251 + ... + 1408256.

It is an arithmetic number, because the mean of its divisors is an integer number (2816508).

Almost surely, 2^8449521 is an apocalyptic number.

It is an amenable number.

8449521 is a deficient number, since it is larger than the sum of its proper divisors (2816511).

8449521 is a wasteful number, since it uses less digits than its factorization.

8449521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816510.

The product of its digits is 11520, while the sum is 33.

The square root of 8449521 is about 2906.8059790774. The cubic root of 8449521 is about 203.6779568900.

The spelling of 8449521 in words is "eight million, four hundred forty-nine thousand, five hundred twenty-one".