810427025 has 6 divisors (see below), whose sum is σ = 1004929542. Its totient is φ = 648341600.

The previous prime is 810427019. The next prime is 810427027. The reversal of 810427025 is 520724018.

It is a Cunningham number, because it is equal to 28468²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 810427024 = 1^2 + 28468^2 .

It is not a de Polignac number, because 810427025 - 2⁶ = 810426961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810427027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16208516 + ... + 16208565.

It is an arithmetic number, because the mean of its divisors is an integer number (167488257).

Almost surely, 2^810427025 is an apocalyptic number.

It is an amenable number.

810427025 is a deficient number, since it is larger than the sum of its proper divisors (194502517).

810427025 is a wasteful number, since it uses less digits than its factorization.

810427025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32417091 (or 32417086 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 810427025 is about 28468.0000175636. Note that the first 4 decimals coincide. The cubic root of 810427025 is about 932.3335336205. Note that the first 3 decimals are identical.

The spelling of 810427025 in words is "eight hundred ten million, four hundred twenty-seven thousand, twenty-five".