800641 has 4 divisors (see below), whose sum is σ = 842800. Its totient is φ = 758484.

The previous prime is 800623. The next prime is 800647. The reversal of 800641 is 146008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800641 is a prime.

It is a super-3 number, since 3×800641³ = 1539695119133324163, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 42139 = 800641 / (8 + 0 + 0 + 6 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21051 + ... + 21088.

It is an arithmetic number, because the mean of its divisors is an integer number (210700).

2⁸⁰⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

800641 is a deficient number, since it is larger than the sum of its proper divisors (42159).

800641 is a wasteful number, since it uses less digits than its factorization.

800641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42158.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 800641 is about 894.7854491441. The cubic root of 800641 is about 92.8565638735.

Adding to 800641 its reverse (146008), we get a palindrome (946649).

It can be divided in two parts, 800 and 641, that added together give a palindrome (1441).

The spelling of 800641 in words is "eight hundred thousand, six hundred forty-one".