1023985 has 4 divisors (see below), whose sum is σ = 1228788. Its totient is φ = 819184.

The previous prime is 1023977. The next prime is 1023991. The reversal of 1023985 is 5893201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 456976 + 567009 = 676^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023985 - 2³ = 1023977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102394 + ... + 102403.

It is an arithmetic number, because the mean of its divisors is an integer number (307197).

2^1023985 is an apocalyptic number.

It is an amenable number.

1023985 is a deficient number, since it is larger than the sum of its proper divisors (204803).

1023985 is an equidigital number, since it uses as much as digits as its factorization.

1023985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204802.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1023985 is about 1011.9214396385. The cubic root of 1023985 is about 100.7931918325.

The spelling of 1023985 in words is "one million, twenty-three thousand, nine hundred eighty-five".