8610521 has 2 divisors, whose sum is σ = 8610522. Its totient is φ = 8610520.

The previous prime is 8610509. The next prime is 8610523. The reversal of 8610521 is 1250168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 287296 = 2885^2 + 536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8610521 is a prime.

Together with 8610523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8610523) 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 as a sum of consecutive naturals, namely, 4305260 + 4305261.

It is an arithmetic number, because the mean of its divisors is an integer number (4305261).

Almost surely, 2^8610521 is an apocalyptic number.

It is an amenable number.

8610521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8610521 is an equidigital number, since it uses as much as digits as its factorization.

8610521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 8610521 is about 2934.3689270438. The cubic root of 8610521 is about 204.9634755472.

Adding to 8610521 its reverse (1250168), we get a palindrome (9860689).

The spelling of 8610521 in words is "eight million, six hundred ten thousand, five hundred twenty-one".