1985503 has 8 divisors (see below), whose sum is σ = 2153648. Its totient is φ = 1819584.

The previous prime is 1985491. The next prime is 1985509. The reversal of 1985503 is 3055891.

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

It is not a de Polignac number, because 1985503 - 2⁵ = 1985471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985509) 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, 1651 + ... + 2587.

It is an arithmetic number, because the mean of its divisors is an integer number (269206).

2^1985503 is an apocalyptic number.

1985503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1985503 is a deficient number, since it is larger than the sum of its proper divisors (168145).

1985503 is a wasteful number, since it uses less digits than its factorization.

1985503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1985503 is about 1409.0787770739. The cubic root of 1985503 is about 125.6869485644.

The spelling of 1985503 in words is "one million, nine hundred eighty-five thousand, five hundred three".