1000863 has 16 divisors (see below), whose sum is σ = 1561600. Its totient is φ = 631800.

The previous prime is 1000861. The next prime is 1000889. The reversal of 1000863 is 3680001.

It is not a de Polignac number, because 1000863 - 2¹ = 1000861 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 (1000861) 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, 463 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (97600).

2^1000863 is an apocalyptic number.

1000863 is a deficient number, since it is larger than the sum of its proper divisors (560737).

1000863 is a wasteful number, since it uses less digits than its factorization.

1000863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1973 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1000863 is about 1000.4314069440. The cubic root of 1000863 is about 100.0287583954.

Adding to 1000863 its reverse (3680001), we get a palindrome (4680864).

The spelling of 1000863 in words is "one million, eight hundred sixty-three", and thus it is an aban number.