2775161 has 2 divisors, whose sum is σ = 2775162. Its totient is φ = 2775160.

The previous prime is 2775137. The next prime is 2775163. The reversal of 2775161 is 1615772.

2775161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2421136 + 354025 = 1556^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2775161 - 2¹⁰ = 2774137 is a prime.

It is a Sophie Germain prime.

Together with 2775163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2775163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387580 + 1387581.

It is an arithmetic number, because the mean of its divisors is an integer number (1387581).

2^2775161 is an apocalyptic number.

It is an amenable number.

2775161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775161 is an equidigital number, since it uses as much as digits as its factorization.

2775161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 29.

The square root of 2775161 is about 1665.8814483630. The cubic root of 2775161 is about 140.5279554982.

The spelling of 2775161 in words is "two million, seven hundred seventy-five thousand, one hundred sixty-one".