806506 has 4 divisors (see below), whose sum is σ = 1209762. Its totient is φ = 403252.

The previous prime is 806503. The next prime is 806513. The reversal of 806506 is 605608.

806506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 707281 + 99225 = 841^2 + 315^2 .

It is not an unprimeable number, because it can be changed into a prime (806503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201625 + ... + 201628.

2⁸⁰⁶⁵⁰⁶ is an apocalyptic number.

806506 is a deficient number, since it is larger than the sum of its proper divisors (403256).

806506 is a wasteful number, since it uses less digits than its factorization.

806506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403255.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 806506 is about 898.0567910773. The cubic root of 806506 is about 93.0827490272.

It can be divided in two parts, 80650 and 6, that added together give a square (80656 = 284²).

The spelling of 806506 in words is "eight hundred six thousand, five hundred six".