1855849 has 2 divisors, whose sum is σ = 1855850. Its totient is φ = 1855848.

The previous prime is 1855823. The next prime is 1855853. The reversal of 1855849 is 9485581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1841449 + 14400 = 1357^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855849 - 2⁵ = 1855817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1855349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927924 + 927925.

It is an arithmetic number, because the mean of its divisors is an integer number (927925).

2^1855849 is an apocalyptic number.

It is an amenable number.

1855849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855849 is an equidigital number, since it uses as much as digits as its factorization.

1855849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 40.

The square root of 1855849 is about 1362.2954892387. The cubic root of 1855849 is about 122.8893401796.

It can be divided in two parts, 1855 and 849, that added together give a square (2704 = 52²).

The spelling of 1855849 in words is "one million, eight hundred fifty-five thousand, eight hundred forty-nine".