808621 has 16 divisors (see below), whose sum is σ = 959040. Its totient is φ = 673920.

The previous prime is 808603. The next prime is 808627. The reversal of 808621 is 126808.

It is a cyclic number.

It is not a de Polignac number, because 808621 - 2⁵ = 808589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808627) 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 15 ways as a sum of consecutive naturals, for example, 11041 + ... + 11113.

It is an arithmetic number, because the mean of its divisors is an integer number (59940).

2⁸⁰⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

808621 is a deficient number, since it is larger than the sum of its proper divisors (150419).

808621 is a wasteful number, since it uses less digits than its factorization.

808621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 808621 is about 899.2335625409. The cubic root of 808621 is about 93.1640454558.

The spelling of 808621 in words is "eight hundred eight thousand, six hundred twenty-one".