2561071 has 2 divisors, whose sum is σ = 2561072. Its totient is φ = 2561070.

The previous prime is 2561063. The next prime is 2561089. The reversal of 2561071 is 1701652.

2561071 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 is a cyclic number.

It is not a de Polignac number, because 2561071 - 2³ = 2561063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561021) 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, 1280535 + 1280536.

It is an arithmetic number, because the mean of its divisors is an integer number (1280536).

2^2561071 is an apocalyptic number.

2561071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561071 is an equidigital number, since it uses as much as digits as its factorization.

2561071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2561071 is about 1600.3346525024. The cubic root of 2561071 is about 136.8171499936.

The spelling of 2561071 in words is "two million, five hundred sixty-one thousand, seventy-one".