1081563 has 8 divisors (see below), whose sum is σ = 1648128. Its totient is φ = 618024.

The previous prime is 1081541. The next prime is 1081583. The reversal of 1081563 is 3651801.

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

It is not a de Polignac number, because 1081563 - 2⁸ = 1081307 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1081563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1081513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25731 + ... + 25772.

It is an arithmetic number, because the mean of its divisors is an integer number (206016).

2^1081563 is an apocalyptic number.

1081563 is a deficient number, since it is larger than the sum of its proper divisors (566565).

1081563 is an equidigital number, since it uses as much as digits as its factorization.

1081563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51513.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1081563 is about 1039.9822113863. The cubic root of 1081563 is about 102.6480272472.

It can be divided in two parts, 10815 and 63, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 1081563 in words is "one million, eighty-one thousand, five hundred sixty-three".