1011563 has 16 divisors (see below), whose sum is σ = 1238016. Its totient is φ = 807840.

The previous prime is 1011559. The next prime is 1011583. The reversal of 1011563 is 3651101.

It is a cyclic number.

It is not a de Polignac number, because 1011563 - 2² = 1011559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011553) 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, 9770 + ... + 9872.

It is an arithmetic number, because the mean of its divisors is an integer number (77376).

2^1011563 is an apocalyptic number.

1011563 is a deficient number, since it is larger than the sum of its proper divisors (226453).

1011563 is a wasteful number, since it uses less digits than its factorization.

1011563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1011563 is about 1005.7648830616. The cubic root of 1011563 is about 100.3839572151.

Adding to 1011563 its reverse (3651101), we get a palindrome (4662664).

The spelling of 1011563 in words is "one million, eleven thousand, five hundred sixty-three".