8555161 has 4 divisors (see below), whose sum is σ = 8565300. Its totient is φ = 8545024.

The previous prime is 8555159. The next prime is 8555171. The reversal of 8555161 is 1615558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 608400 + 7946761 = 780^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 8555161 - 2¹ = 8555159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8555171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (2141325).

Almost surely, 2^8555161 is an apocalyptic number.

It is an amenable number.

8555161 is a deficient number, since it is larger than the sum of its proper divisors (10139).

8555161 is an equidigital number, since it uses as much as digits as its factorization.

8555161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10138.

The product of its digits is 6000, while the sum is 31.

The square root of 8555161 is about 2924.9206826853. The cubic root of 8555161 is about 204.5232705668.

The spelling of 8555161 in words is "eight million, five hundred fifty-five thousand, one hundred sixty-one".