812245 has 16 divisors (see below), whose sum is σ = 1163520. Its totient is φ = 532224.

The previous prime is 812233. The next prime is 812249. The reversal of 812245 is 542218.

812245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812245 - 2⁵ = 812213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (72720).

2⁸¹²²⁴⁵ is an apocalyptic number.

It is an amenable number.

812245 is a deficient number, since it is larger than the sum of its proper divisors (351275).

812245 is a wasteful number, since it uses less digits than its factorization.

812245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its digits is 640, while the sum is 22.

The square root of 812245 is about 901.2463592159. The cubic root of 812245 is about 93.3030159467.

The spelling of 812245 in words is "eight hundred twelve thousand, two hundred forty-five".