3256861 has 2 divisors, whose sum is σ = 3256862. Its totient is φ = 3256860.

The previous prime is 3256831. The next prime is 3256871. The reversal of 3256861 is 1686523.

3256861 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., 2722500 + 534361 = 1650^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 3256861 - 2¹¹ = 3254813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3256831) 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, 1628430 + 1628431.

It is an arithmetic number, because the mean of its divisors is an integer number (1628431).

Almost surely, 2^3256861 is an apocalyptic number.

It is an amenable number.

3256861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3256861 is an equidigital number, since it uses as much as digits as its factorization.

3256861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 3256861 is about 1804.6775335223. The cubic root of 3256861 is about 148.2289644422.

The spelling of 3256861 in words is "three million, two hundred fifty-six thousand, eight hundred sixty-one".