811025 has 6 divisors (see below), whose sum is σ = 1005702. Its totient is φ = 648800.

The previous prime is 810989. The next prime is 811037. The reversal of 811025 is 520118.

It can be written as a sum of positive squares in 3 ways, for example, as 208849 + 602176 = 457^2 + 776^2 .

It is not a de Polignac number, because 811025 - 2⁶ = 810961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 810994 and 811012.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16196 + ... + 16245.

It is an arithmetic number, because the mean of its divisors is an integer number (167617).

2⁸¹¹⁰²⁵ is an apocalyptic number.

It is an amenable number.

811025 is a deficient number, since it is larger than the sum of its proper divisors (194677).

811025 is a wasteful number, since it uses less digits than its factorization.

811025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32451 (or 32446 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 811025 is about 900.5692644100. The cubic root of 811025 is about 93.2562785222.

The spelling of 811025 in words is "eight hundred eleven thousand, twenty-five".