1005863 has 4 divisors (see below), whose sum is σ = 1007880. Its totient is φ = 1003848.

The previous prime is 1005833. The next prime is 1005883. The reversal of 1005863 is 3685001.

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

It is a cyclic number.

It is not a de Polignac number, because 1005863 - 2¹⁴ = 989479 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 (1005833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (251970).

2^1005863 is an apocalyptic number.

1005863 is a deficient number, since it is larger than the sum of its proper divisors (2017).

1005863 is an equidigital number, since it uses as much as digits as its factorization.

1005863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1005863 is about 1002.9272157041. The cubic root of 1005863 is about 100.1950526307.

The spelling of 1005863 in words is "one million, five thousand, eight hundred sixty-three".