810625 has 10 divisors (see below), whose sum is σ = 1013738. Its totient is φ = 648000.

The previous prime is 810587. The next prime is 810643. The reversal of 810625 is 526018.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 76176 + 734449 = 276^2 + 857^2 .

It is not a de Polignac number, because 810625 - 2¹⁵ = 777857 is a prime.

It is a super-2 number, since 2×810625² = 1314225781250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 810596 and 810605.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24 + ... + 1273.

2⁸¹⁰⁶²⁵ is an apocalyptic number.

It is an amenable number.

810625 is a deficient number, since it is larger than the sum of its proper divisors (203113).

810625 is an equidigital number, since it uses as much as digits as its factorization.

810625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 810625 is about 900.3471552685. The cubic root of 810625 is about 93.2409445742.

The spelling of 810625 in words is "eight hundred ten thousand, six hundred twenty-five".