425439 has 16 divisors (see below), whose sum is σ = 720640. Its totient is φ = 243000.

The previous prime is 425423. The next prime is 425441. The reversal of 425439 is 934524.

It is not a de Polignac number, because 425439 - 2⁴ = 425423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425439.

It is not an unprimeable number, because it can be changed into a prime (425419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 937 + ... + 1314.

It is an arithmetic number, because the mean of its divisors is an integer number (45040).

2⁴²⁵⁴³⁹ is an apocalyptic number.

425439 is a deficient number, since it is larger than the sum of its proper divisors (295201).

425439 is a wasteful number, since it uses less digits than its factorization.

425439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267 (or 2261 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 425439 is about 652.2568512480. The cubic root of 425439 is about 75.2106080365.

The spelling of 425439 in words is "four hundred twenty-five thousand, four hundred thirty-nine".