425825 has 6 divisors (see below), whose sum is σ = 528054. Its totient is φ = 340640.

The previous prime is 425819. The next prime is 425837. The reversal of 425825 is 528524.

It can be written as a sum of positive squares in 3 ways, for example, as 4624 + 421201 = 68^2 + 649^2 .

It is not a de Polignac number, because 425825 - 2¹⁴ = 409441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 425794 and 425803.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425825.

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, 8492 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (88009).

2⁴²⁵⁸²⁵ is an apocalyptic number.

It is an amenable number.

425825 is a deficient number, since it is larger than the sum of its proper divisors (102229).

425825 is a wasteful number, since it uses less digits than its factorization.

425825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17043 (or 17038 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 425825 is about 652.5526798658. The cubic root of 425825 is about 75.2333473082.

Adding to 425825 its product of digits (3200), we get a square (429025 = 655²).

It can be divided in two parts, 42 and 5825, that multiplied together give a triangular number (244650 = T₆₉₉).

The spelling of 425825 in words is "four hundred twenty-five thousand, eight hundred twenty-five".