1081863 has 16 divisors (see below), whose sum is σ = 1697760. Its totient is φ = 678528.

The previous prime is 1081859. The next prime is 1081891. The reversal of 1081863 is 3681801.

It is not a de Polignac number, because 1081863 - 2² = 1081859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (106110).

2^1081863 is an apocalyptic number.

1081863 is a deficient number, since it is larger than the sum of its proper divisors (615897).

1081863 is a wasteful number, since it uses less digits than its factorization.

1081863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1081863 is about 1040.1264346223. The cubic root of 1081863 is about 102.6575170816.

The spelling of 1081863 in words is "one million, eighty-one thousand, eight hundred sixty-three".