8518121 has 2 divisors, whose sum is σ = 8518122. Its totient is φ = 8518120.

The previous prime is 8518109. The next prime is 8518157. The reversal of 8518121 is 1218158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7778521 + 739600 = 2789^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 8518121 - 2¹⁴ = 8501737 is a prime.

It is a Chen prime.

It is equal to p₅₇₂₂₇₃ and since 8518121 and 572273 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8518021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259060 + 4259061.

It is an arithmetic number, because the mean of its divisors is an integer number (4259061).

Almost surely, 2^8518121 is an apocalyptic number.

It is an amenable number.

8518121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518121 is an equidigital number, since it uses as much as digits as its factorization.

8518121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 26.

The square root of 8518121 is about 2918.5820187207. The cubic root of 8518121 is about 204.2276789658.

The spelling of 8518121 in words is "eight million, five hundred eighteen thousand, one hundred twenty-one".