806491 has 12 divisors (see below), whose sum is σ = 953040. Its totient is φ = 680400.

The previous prime is 806483. The next prime is 806503. The reversal of 806491 is 194608.

It is not a de Polignac number, because 806491 - 2³ = 806483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806291) 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 11 ways as a sum of consecutive naturals, for example, 5266 + ... + 5416.

It is an arithmetic number, because the mean of its divisors is an integer number (79420).

2⁸⁰⁶⁴⁹¹ is an apocalyptic number.

806491 is a deficient number, since it is larger than the sum of its proper divisors (146549).

806491 is a wasteful number, since it uses less digits than its factorization.

806491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 806491 is about 898.0484396735. The cubic root of 806491 is about 93.0821719495.

The spelling of 806491 in words is "eight hundred six thousand, four hundred ninety-one".