811217 has 8 divisors (see below), whose sum is σ = 915840. Its totient is φ = 711760.

The previous prime is 811207. The next prime is 811231. The reversal of 811217 is 712118.

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 811217 - 2⁸ = 810961 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811217.

It is not an unprimeable number, because it can be changed into a prime (811207) 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, 953 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (114480).

2⁸¹¹²¹⁷ is an apocalyptic number.

It is an amenable number.

811217 is a deficient number, since it is larger than the sum of its proper divisors (104623).

811217 is a wasteful number, since it uses less digits than its factorization.

811217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583.

The product of its digits is 112, while the sum is 20.

The square root of 811217 is about 900.6758573427. The cubic root of 811217 is about 93.2636370265.

Subtracting from 811217 its reverse (712118), we obtain a palindrome (99099).

The spelling of 811217 in words is "eight hundred eleven thousand, two hundred seventeen".