8604021 has 4 divisors (see below), whose sum is σ = 11472032. Its totient is φ = 5736012.

The previous prime is 8603963. The next prime is 8604059. The reversal of 8604021 is 1204068.

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 not a de Polignac number, because 8604021 - 2⁷ = 8603893 is a prime.

It is a Duffinian number.

8604021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8604221) 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, 1434001 + ... + 1434006.

It is an arithmetic number, because the mean of its divisors is an integer number (2868008).

Almost surely, 2^8604021 is an apocalyptic number.

It is an amenable number.

8604021 is a deficient number, since it is larger than the sum of its proper divisors (2868011).

8604021 is a wasteful number, since it uses less digits than its factorization.

8604021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868010.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 8604021 is about 2933.2611544150. The cubic root of 8604021 is about 204.9118875744.

Adding to 8604021 its reverse (1204068), we get a palindrome (9808089).

The spelling of 8604021 in words is "eight million, six hundred four thousand, twenty-one".