424825 has 6 divisors (see below), whose sum is σ = 526814. Its totient is φ = 339840.

The previous prime is 424819. The next prime is 424829. The reversal of 424825 is 528424.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1024 + 423801 = 32^2 + 651^2 .

It is not a de Polignac number, because 424825 - 2³ = 424817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 16993 = 424825 / (4 + 2 + 4 + 8 + 2 + 5).

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 424825.

It is not an unprimeable number, because it can be changed into a prime (424829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8472 + ... + 8521.

2⁴²⁴⁸²⁵ is an apocalyptic number.

It is an amenable number.

424825 is a deficient number, since it is larger than the sum of its proper divisors (101989).

424825 is a wasteful number, since it uses less digits than its factorization.

424825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17003 (or 16998 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 424825 is about 651.7860078277. The cubic root of 424825 is about 75.1744089208.

The spelling of 424825 in words is "four hundred twenty-four thousand, eight hundred twenty-five".