1985135 has 4 divisors (see below), whose sum is σ = 2382168. Its totient is φ = 1588104.

The previous prime is 1985077. The next prime is 1985167. The reversal of 1985135 is 5315891.

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

It is a cyclic number.

It is not a de Polignac number, because 1985135 - 2¹⁴ = 1968751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 198509 + ... + 198518.

It is an arithmetic number, because the mean of its divisors is an integer number (595542).

2^1985135 is an apocalyptic number.

1985135 is a deficient number, since it is larger than the sum of its proper divisors (397033).

1985135 is an equidigital number, since it uses as much as digits as its factorization.

1985135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397032.

The product of its digits is 5400, while the sum is 32.

The square root of 1985135 is about 1408.9481892532. The cubic root of 1985135 is about 125.6791829999.

The spelling of 1985135 in words is "one million, nine hundred eighty-five thousand, one hundred thirty-five".