8549161 has 4 divisors (see below), whose sum is σ = 8555092. Its totient is φ = 8543232.

The previous prime is 8549153. The next prime is 8549201. The reversal of 8549161 is 1619458.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1619458 = 2 ⋅809729.

It can be written as a sum of positive squares in 2 ways, for example, as 2576025 + 5973136 = 1605^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 8549161 - 2³ = 8549153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8544161) 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, 745 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (2138773).

Almost surely, 2^8549161 is an apocalyptic number.

It is an amenable number.

8549161 is a deficient number, since it is larger than the sum of its proper divisors (5931).

8549161 is a wasteful number, since it uses less digits than its factorization.

8549161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930.

The product of its digits is 8640, while the sum is 34.

The square root of 8549161 is about 2923.8948339501. The cubic root of 8549161 is about 204.4754465453.

The spelling of 8549161 in words is "eight million, five hundred forty-nine thousand, one hundred sixty-one".