1985755 has 4 divisors (see below), whose sum is σ = 2382912. Its totient is φ = 1588600.

The previous prime is 1985743. The next prime is 1985759. The reversal of 1985755 is 5575891.

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

It is a de Polignac number, because none of the positive numbers 2^k-1985755 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985759) 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 3 ways as a sum of consecutive naturals, for example, 198571 + ... + 198580.

It is an arithmetic number, because the mean of its divisors is an integer number (595728).

2^1985755 is an apocalyptic number.

1985755 is a deficient number, since it is larger than the sum of its proper divisors (397157).

1985755 is an equidigital number, since it uses as much as digits as its factorization.

1985755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397156.

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

The square root of 1985755 is about 1409.1681943615. The cubic root of 1985755 is about 125.6922657344.

The spelling of 1985755 in words is "one million, nine hundred eighty-five thousand, seven hundred fifty-five".