8529421 has 4 divisors (see below), whose sum is σ = 8537500. Its totient is φ = 8521344.

The previous prime is 8529413. The next prime is 8529439. The reversal of 8529421 is 1249258.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4056196 + 4473225 = 2014^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 8529421 - 2³ = 8529413 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 (8529221) 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, 2166 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (2134375).

Almost surely, 2^8529421 is an apocalyptic number.

It is an amenable number.

8529421 is a deficient number, since it is larger than the sum of its proper divisors (8079).

8529421 is a wasteful number, since it uses less digits than its factorization.

8529421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078.

The product of its digits is 5760, while the sum is 31.

The square root of 8529421 is about 2920.5172487078. The cubic root of 8529421 is about 204.3179474275.

The spelling of 8529421 in words is "eight million, five hundred twenty-nine thousand, four hundred twenty-one".