1985734 has 4 divisors (see below), whose sum is σ = 2978604. Its totient is φ = 992866.

The previous prime is 1985729. The next prime is 1985741. The reversal of 1985734 is 4375891.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1985693 and 1985702.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 496432 + ... + 496435.

It is an arithmetic number, because the mean of its divisors is an integer number (744651).

2^1985734 is an apocalyptic number.

1985734 is a deficient number, since it is larger than the sum of its proper divisors (992870).

1985734 is an equidigital number, since it uses as much as digits as its factorization.

1985734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992869.

The product of its digits is 30240, while the sum is 37.

The square root of 1985734 is about 1409.1607431376. The cubic root of 1985734 is about 125.6918226541.

It can be divided in two parts, 19857 and 34, that added together give a palindrome (19891).

The spelling of 1985734 in words is "one million, nine hundred eighty-five thousand, seven hundred thirty-four".