1985575 has 6 divisors (see below), whose sum is σ = 2462144. Its totient is φ = 1588440.

The previous prime is 1985573. The next prime is 1985587. The reversal of 1985575 is 5755891.

It is not a de Polignac number, because 1985575 - 2¹ = 1985573 is a prime.

It is an Ulam number.

It is a Duffinian number.

1985575 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985573) 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 5 ways as a sum of consecutive naturals, for example, 39687 + ... + 39736.

2^1985575 is an apocalyptic number.

1985575 is a deficient number, since it is larger than the sum of its proper divisors (476569).

1985575 is an equidigital number, since it uses as much as digits as its factorization.

1985575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79433 (or 79428 counting only the distinct ones).

The product of its digits is 63000, while the sum is 40.

The square root of 1985575 is about 1409.1043254493. The cubic root of 1985575 is about 125.6884678017.

The spelling of 1985575 in words is "one million, nine hundred eighty-five thousand, five hundred seventy-five".