427681825 has 6 divisors (see below), whose sum is σ = 530325494. Its totient is φ = 342145440.

The previous prime is 427681781. The next prime is 427681831. The reversal of 427681825 is 528186724.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8579041 + 419102784 = 2929^2 + 20472^2 .

It is not a de Polignac number, because 427681825 - 2⁹ = 427681313 is a prime.

It is a Duffinian number.

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, 8553612 + ... + 8553661.

Almost surely, 2^427681825 is an apocalyptic number.

It is an amenable number.

427681825 is a deficient number, since it is larger than the sum of its proper divisors (102643669).

427681825 is a wasteful number, since it uses less digits than its factorization.

427681825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107283 (or 17107278 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 427681825 is about 20680.4696513401. The cubic root of 427681825 is about 753.4254130579.

It can be divided in two parts, 42 and 7681825, that added together give a palindrome (7681867).

The spelling of 427681825 in words is "four hundred twenty-seven million, six hundred eighty-one thousand, eight hundred twenty-five".