1029985 has 16 divisors (see below), whose sum is σ = 1374912. Its totient is φ = 734400.

The previous prime is 1029983. The next prime is 1029989. The reversal of 1029985 is 5899201.

It is not a de Polignac number, because 1029985 - 2¹ = 1029983 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1029985.

It is not an unprimeable number, because it can be changed into a prime (1029983) 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 15 ways as a sum of consecutive naturals, for example, 3202 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (85932).

2^1029985 is an apocalyptic number.

It is an amenable number.

1029985 is a deficient number, since it is larger than the sum of its proper divisors (344927).

1029985 is a wasteful number, since it uses less digits than its factorization.

1029985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1029985 is about 1014.8817665127. The cubic root of 1029985 is about 100.9896731591.

The spelling of 1029985 in words is "one million, twenty-nine thousand, nine hundred eighty-five".