1841985 has 12 divisors (see below), whose sum is σ = 3192852. Its totient is φ = 982368.

The previous prime is 1841969. The next prime is 1842011. The reversal of 1841985 is 5891481.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 1252161 = 768^2 + 1119^2 .

It is not a de Polignac number, because 1841985 - 2⁴ = 1841969 is a prime.

It is a Curzon number.

1841985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20422 + ... + 20511.

It is an arithmetic number, because the mean of its divisors is an integer number (266071).

2^1841985 is an apocalyptic number.

1841985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1841985 is a deficient number, since it is larger than the sum of its proper divisors (1350867).

1841985 is a wasteful number, since it uses less digits than its factorization.

1841985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40944 (or 40941 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1841985 is about 1357.1974801038. The cubic root of 1841985 is about 122.5825626953.

The spelling of 1841985 in words is "one million, eight hundred forty-one thousand, nine hundred eighty-five".