8453521 has 4 divisors (see below), whose sum is σ = 8467312. Its totient is φ = 8439732.

The previous prime is 8453513. The next prime is 8453527. The reversal of 8453521 is 1253548.

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 8453521 - 2³ = 8453513 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 8453521.

It is not an unprimeable number, because it can be changed into a prime (8453527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5931 + ... + 7216.

It is an arithmetic number, because the mean of its divisors is an integer number (2116828).

Almost surely, 2^8453521 is an apocalyptic number.

It is an amenable number.

8453521 is a deficient number, since it is larger than the sum of its proper divisors (13791).

8453521 is a wasteful number, since it uses less digits than its factorization.

8453521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13790.

The product of its digits is 4800, while the sum is 28.

The square root of 8453521 is about 2907.4939380848. The cubic root of 8453521 is about 203.7100921751.

The spelling of 8453521 in words is "eight million, four hundred fifty-three thousand, five hundred twenty-one".