2867561 has 2 divisors, whose sum is σ = 2867562. Its totient is φ = 2867560.

The previous prime is 2867519. The next prime is 2867569. The reversal of 2867561 is 1657682.

2867561 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., 1907161 + 960400 = 1381^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2867561 - 2⁶ = 2867497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2867569) 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, 1433780 + 1433781.

It is an arithmetic number, because the mean of its divisors is an integer number (1433781).

2^2867561 is an apocalyptic number.

It is an amenable number.

2867561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2867561 is an equidigital number, since it uses as much as digits as its factorization.

2867561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 2867561 is about 1693.3874335190. The cubic root of 2867561 is about 142.0706023304.

The spelling of 2867561 in words is "two million, eight hundred sixty-seven thousand, five hundred sixty-one".