1001863 has 8 divisors (see below), whose sum is σ = 1047600. Its totient is φ = 956928.

The previous prime is 1001839. The next prime is 1001911. The reversal of 1001863 is 3681001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001863 - 2⁵ = 1001831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001563) 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 7 ways as a sum of consecutive naturals, for example, 5095 + ... + 5287.

It is an arithmetic number, because the mean of its divisors is an integer number (130950).

2^1001863 is an apocalyptic number.

1001863 is a deficient number, since it is larger than the sum of its proper divisors (45737).

1001863 is a wasteful number, since it uses less digits than its factorization.

1001863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1001863 is about 1000.9310665575. The cubic root of 1001863 is about 100.0620614758.

Adding to 1001863 its reverse (3681001), we get a palindrome (4682864).

The spelling of 1001863 in words is "one million, one thousand, eight hundred sixty-three".