2767561 has 2 divisors, whose sum is σ = 2767562. Its totient is φ = 2767560.

The previous prime is 2767553. The next prime is 2767571. The reversal of 2767561 is 1657672.

2767561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 1279161 = 1220^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2767561 - 2³ = 2767553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2767511) 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, 1383780 + 1383781.

It is an arithmetic number, because the mean of its divisors is an integer number (1383781).

2^2767561 is an apocalyptic number.

It is an amenable number.

2767561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2767561 is an equidigital number, since it uses as much as digits as its factorization.

2767561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 34.

The square root of 2767561 is about 1663.5988098096. The cubic root of 2767561 is about 140.3995558734.

The spelling of 2767561 in words is "two million, seven hundred sixty-seven thousand, five hundred sixty-one".