1985443 has 8 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 1856808.

The previous prime is 1985441. The next prime is 1985453. The reversal of 1985443 is 3445891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1985443 - 2¹ = 1985441 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1985399 and 1985408.

It is not an unprimeable number, because it can be changed into a prime (1985441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

2^1985443 is an apocalyptic number.

1985443 is a deficient number, since it is larger than the sum of its proper divisors (131357).

1985443 is a wasteful number, since it uses less digits than its factorization.

1985443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361.

The product of its digits is 17280, while the sum is 34.

The square root of 1985443 is about 1409.0574864071. The cubic root of 1985443 is about 125.6856825052.

The spelling of 1985443 in words is "one million, nine hundred eighty-five thousand, four hundred forty-three".