811245 has 8 divisors (see below), whose sum is σ = 1298016. Its totient is φ = 432656.

The previous prime is 811241. The next prime is 811253. The reversal of 811245 is 542118.

811245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 811245 - 2² = 811241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27027 + ... + 27056.

It is an arithmetic number, because the mean of its divisors is an integer number (162252).

2⁸¹¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

811245 is a deficient number, since it is larger than the sum of its proper divisors (486771).

811245 is a wasteful number, since it uses less digits than its factorization.

811245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54091.

The product of its digits is 320, while the sum is 21.

The square root of 811245 is about 900.6914010914. The cubic root of 811245 is about 93.2647100447.

It can be divided in two parts, 81 and 1245, that added together give a triangular number (1326 = T₅₁).

The spelling of 811245 in words is "eight hundred eleven thousand, two hundred forty-five".