812522 has 8 divisors (see below), whose sum is σ = 1260900. Its totient is φ = 392224.

The previous prime is 812519. The next prime is 812527. The reversal of 812522 is 225218.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 22201 = 889^2 + 149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 812494 and 812503.

It is not an unprimeable number, because it can be changed into a prime (812527) 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 3 ways as a sum of consecutive naturals, for example, 6947 + ... + 7062.

2⁸¹²⁵²² is an apocalyptic number.

812522 is a deficient number, since it is larger than the sum of its proper divisors (448378).

812522 is a wasteful number, since it uses less digits than its factorization.

812522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040.

The product of its digits is 320, while the sum is 20.

The square root of 812522 is about 901.4000221877. The cubic root of 812522 is about 93.3136211205.

The spelling of 812522 in words is "eight hundred twelve thousand, five hundred twenty-two".