8555409 has 16 divisors (see below), whose sum is σ = 12971200. Its totient is φ = 5570208.

The previous prime is 8555389. The next prime is 8555441. The reversal of 8555409 is 9045558.

It is a happy number.

8555409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8555409 - 2⁸ = 8555153 is a prime.

It is a Duffinian number.

8555409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8555809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (810700).

Almost surely, 2^8555409 is an apocalyptic number.

It is an amenable number.

8555409 is a deficient number, since it is larger than the sum of its proper divisors (4415791).

8555409 is a wasteful number, since it uses less digits than its factorization.

8555409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7421 (or 7415 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 8555409 is about 2924.9630766900. The cubic root of 8555409 is about 204.5252468118.

The spelling of 8555409 in words is "eight million, five hundred fifty-five thousand, four hundred nine".