2551859 has 2 divisors, whose sum is σ = 2551860. Its totient is φ = 2551858.

The previous prime is 2551841. The next prime is 2551867. The reversal of 2551859 is 9581552.

2551859 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 is a cyclic number.

It is not a de Polignac number, because 2551859 - 2⁸ = 2551603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2551559) 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, 1275929 + 1275930.

It is an arithmetic number, because the mean of its divisors is an integer number (1275930).

2^2551859 is an apocalyptic number.

2551859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551859 is an equidigital number, since it uses as much as digits as its factorization.

2551859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 35.

The square root of 2551859 is about 1597.4539116982. The cubic root of 2551859 is about 136.6529122254.

The spelling of 2551859 in words is "two million, five hundred fifty-one thousand, eight hundred fifty-nine".