8620121 has 2 divisors, whose sum is σ = 8620122. Its totient is φ = 8620120.

The previous prime is 8620111. The next prime is 8620133. The reversal of 8620121 is 1210268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 25 = 2936^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 8620121 - 2¹⁰ = 8619097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8620093 and 8620102.

It is not a weakly prime, because it can be changed into another prime (8620111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310060 + 4310061.

It is an arithmetic number, because the mean of its divisors is an integer number (4310061).

Almost surely, 2^8620121 is an apocalyptic number.

It is an amenable number.

8620121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8620121 is an equidigital number, since it uses as much as digits as its factorization.

8620121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 8620121 is about 2936.0042574901. The cubic root of 8620121 is about 205.0396195484.

Adding to 8620121 its reverse (1210268), we get a palindrome (9830389).

The spelling of 8620121 in words is "eight million, six hundred twenty thousand, one hundred twenty-one".