801563 has 8 divisors (see below), whose sum is σ = 937728. Its totient is φ = 670824.

The previous prime is 801557. The next prime is 801569. The reversal of 801563 is 365108.

It is an interprime number because it is at equal distance from previous prime (801557) and next prime (801569).

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

It is not a de Polignac number, because 801563 - 2¹⁰ = 800539 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 801563.

It is not an unprimeable number, because it can be changed into a prime (801569) 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, 1031 + ... + 1632.

It is an arithmetic number, because the mean of its divisors is an integer number (117216).

2⁸⁰¹⁵⁶³ is an apocalyptic number.

801563 is a deficient number, since it is larger than the sum of its proper divisors (136165).

801563 is a wasteful number, since it uses less digits than its factorization.

801563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713.

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

The square root of 801563 is about 895.3005082094. The cubic root of 801563 is about 92.8921940371.

The spelling of 801563 in words is "eight hundred one thousand, five hundred sixty-three".