1980585 has 32 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 993024.

The previous prime is 1980581. The next prime is 1980607. The reversal of 1980585 is 5850891.

It is not a de Polignac number, because 1980585 - 2² = 1980581 is a prime.

It is a Curzon number.

1980585 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1980581) 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 31 ways as a sum of consecutive naturals, for example, 1864 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^1980585 is an apocalyptic number.

1980585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1980585 is a deficient number, since it is larger than the sum of its proper divisors (1751895).

1980585 is a wasteful number, since it uses less digits than its factorization.

1980585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1980585 is about 1407.3325832937. The cubic root of 1980585 is about 125.5830891603.

The spelling of 1980585 in words is "one million, nine hundred eighty thousand, five hundred eighty-five".