1985949 has 24 divisors (see below), whose sum is σ = 3394560. Its totient is φ = 1094688.

The previous prime is 1985939. The next prime is 1985987. The reversal of 1985949 is 9495891.

It is not a de Polignac number, because 1985949 - 2¹² = 1981853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985939) 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 in 23 ways as a sum of consecutive naturals, for example, 1284 + ... + 2370.

It is an arithmetic number, because the mean of its divisors is an integer number (141440).

2^1985949 is an apocalyptic number.

It is an amenable number.

1985949 is a deficient number, since it is larger than the sum of its proper divisors (1408611).

1985949 is a wasteful number, since it uses less digits than its factorization.

1985949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1126 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1985949 is about 1409.2370276146. The cubic root of 1985949 is about 125.6963588049.

The spelling of 1985949 in words is "one million, nine hundred eighty-five thousand, nine hundred forty-nine".