1020985 has 16 divisors (see below), whose sum is σ = 1446912. Its totient is φ = 676800.

The previous prime is 1020979. The next prime is 1020989. The reversal of 1020985 is 5890201.

It is not a de Polignac number, because 1020985 - 2³ = 1020977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020989) 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 15 ways as a sum of consecutive naturals, for example, 615 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (90432).

2^1020985 is an apocalyptic number.

It is an amenable number.

1020985 is a deficient number, since it is larger than the sum of its proper divisors (425927).

1020985 is an equidigital number, since it uses as much as digits as its factorization.

1020985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1020985 is about 1010.4380238293. The cubic root of 1020985 is about 100.6946632558.

The spelling of 1020985 in words is "one million, twenty thousand, nine hundred eighty-five".