809125 has 8 divisors (see below), whose sum is σ = 1009944. Its totient is φ = 647200.

The previous prime is 809101. The next prime is 809141. The reversal of 809125 is 521908.

It can be written as a sum of positive squares in 4 ways, for example, as 113569 + 695556 = 337^2 + 834^2 .

It is not a de Polignac number, because 809125 - 2⁵ = 809093 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 809125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3112 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (126243).

2⁸⁰⁹¹²⁵ is an apocalyptic number.

It is an amenable number.

809125 is a deficient number, since it is larger than the sum of its proper divisors (200819).

809125 is an equidigital number, since it uses as much as digits as its factorization.

809125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488 (or 6478 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 809125 is about 899.5137575379. The cubic root of 809125 is about 93.1833973017.

The spelling of 809125 in words is "eight hundred nine thousand, one hundred twenty-five".