806522 has 4 divisors (see below), whose sum is σ = 1209786. Its totient is φ = 403260.

The previous prime is 806521. The next prime is 806543. The reversal of 806522 is 225608.

It is a happy number.

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., 410881 + 395641 = 641^2 + 629^2 .

It is not an unprimeable number, because it can be changed into a prime (806521) 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 as a sum of consecutive naturals, namely, 201629 + ... + 201632.

2⁸⁰⁶⁵²² is an apocalyptic number.

806522 is a deficient number, since it is larger than the sum of its proper divisors (403264).

806522 is a wasteful number, since it uses less digits than its factorization.

806522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403263.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 806522 is about 898.0656991557. The cubic root of 806522 is about 93.0833645688.

The spelling of 806522 in words is "eight hundred six thousand, five hundred twenty-two".