2855851 has 2 divisors, whose sum is σ = 2855852. Its totient is φ = 2855850.

The previous prime is 2855843. The next prime is 2855857. The reversal of 2855851 is 1585582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2855851 - 2³ = 2855843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2855857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427925 + 1427926.

It is an arithmetic number, because the mean of its divisors is an integer number (1427926).

2^2855851 is an apocalyptic number.

2855851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855851 is an equidigital number, since it uses as much as digits as its factorization.

2855851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16000, while the sum is 34.

The square root of 2855851 is about 1689.9263297552. The cubic root of 2855851 is about 141.8769515279.

The spelling of 2855851 in words is "two million, eight hundred fifty-five thousand, eight hundred fifty-one".