810425 has 24 divisors (see below), whose sum is σ = 1255872. Its totient is φ = 504000.

The previous prime is 810419. The next prime is 810427. The reversal of 810425 is 524018.

It is not a de Polignac number, because 810425 - 2⁴ = 810409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 810397 and 810406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 810425.

It is not an unprimeable number, because it can be changed into a prime (810427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1715 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (52328).

2⁸¹⁰⁴²⁵ is an apocalyptic number.

It is an amenable number.

810425 is a deficient number, since it is larger than the sum of its proper divisors (445447).

810425 is a wasteful number, since it uses less digits than its factorization.

810425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 810425 is about 900.2360801479. The cubic root of 810425 is about 93.2332757085.

The spelling of 810425 in words is "eight hundred ten thousand, four hundred twenty-five".