8555121 has 6 divisors (see below), whose sum is σ = 12357410. Its totient is φ = 5703408.

The previous prime is 8555051. The next prime is 8555123. The reversal of 8555121 is 1215558.

8555121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6305121 + 2250000 = 2511^2 + 1500^2 .

It is not a de Polignac number, because 8555121 - 2⁷ = 8554993 is a prime.

It is a Duffinian number.

8555121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8555123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 475276 + ... + 475293.

Almost surely, 2^8555121 is an apocalyptic number.

It is an amenable number.

8555121 is a deficient number, since it is larger than the sum of its proper divisors (3802289).

8555121 is a wasteful number, since it uses less digits than its factorization.

8555121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950575 (or 950572 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 8555121 is about 2924.9138448850. The cubic root of 8555121 is about 204.5229518141.

The spelling of 8555121 in words is "eight million, five hundred fifty-five thousand, one hundred twenty-one".