1855853 has 2 divisors, whose sum is σ = 1855854. Its totient is φ = 1855852.

The previous prime is 1855849. The next prime is 1855891. The reversal of 1855853 is 3585581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 209764 = 1283^2 + 458^2 .

It is an emirp because it is prime and its reverse (3585581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1855853 - 2² = 1855849 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1855813) 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, 927926 + 927927.

It is an arithmetic number, because the mean of its divisors is an integer number (927927).

2^1855853 is an apocalyptic number.

It is an amenable number.

1855853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855853 is an equidigital number, since it uses as much as digits as its factorization.

1855853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 35.

The square root of 1855853 is about 1362.2969573481. The cubic root of 1855853 is about 122.8894284693.

The spelling of 1855853 in words is "one million, eight hundred fifty-five thousand, eight hundred fifty-three".