6549161 has 2 divisors, whose sum is σ = 6549162. Its totient is φ = 6549160.

The previous prime is 6549139. The next prime is 6549173. The reversal of 6549161 is 1619456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3763600 + 2785561 = 1940^2 + 1669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6549161 is a prime.

It is a Chen prime.

It is equal to p₄₄₇₉₀₈ and since 6549161 and 447908 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6549061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3274580 + 3274581.

It is an arithmetic number, because the mean of its divisors is an integer number (3274581).

Almost surely, 2^6549161 is an apocalyptic number.

It is an amenable number.

6549161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6549161 is an equidigital number, since it uses as much as digits as its factorization.

6549161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 6549161 is about 2559.1328609511. The cubic root of 6549161 is about 187.0948740269.

The spelling of 6549161 in words is "six million, five hundred forty-nine thousand, one hundred sixty-one".