1985841 has 24 divisors (see below), whose sum is σ = 3372096. Its totient is φ = 1110240.

The previous prime is 1985803. The next prime is 1985849. The reversal of 1985841 is 1485891.

It is not a de Polignac number, because 1985841 - 2⁷ = 1985713 is a prime.

It is an Ulam number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1985796 and 1985805.

It is not an unprimeable number, because it can be changed into a prime (1985849) 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 in 23 ways as a sum of consecutive naturals, for example, 516 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (140504).

2^1985841 is an apocalyptic number.

1985841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1985841 is a deficient number, since it is larger than the sum of its proper divisors (1386255).

1985841 is a wasteful number, since it uses less digits than its factorization.

1985841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 1570 counting only the distinct ones).

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

The square root of 1985841 is about 1409.1987084865. The cubic root of 1985841 is about 125.6940802213.

The spelling of 1985841 in words is "one million, nine hundred eighty-five thousand, eight hundred forty-one".