425865 has 32 divisors (see below), whose sum is σ = 777600. Its totient is φ = 197120.

The previous prime is 425861. The next prime is 425869. The reversal of 425865 is 568524.

It is an interprime number because it is at equal distance from previous prime (425861) and next prime (425869).

It is not a de Polignac number, because 425865 - 2² = 425861 is a prime.

It is a Curzon number.

425865 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425865.

It is not an unprimeable number, because it can be changed into a prime (425861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4741 + ... + 4829.

It is an arithmetic number, because the mean of its divisors is an integer number (24300).

2⁴²⁵⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

425865 is a deficient number, since it is larger than the sum of its proper divisors (351735).

425865 is a wasteful number, since it uses less digits than its factorization.

425865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137.

The product of its digits is 9600, while the sum is 30.

The square root of 425865 is about 652.5833280126. The cubic root of 425865 is about 75.2357029236.

The spelling of 425865 in words is "four hundred twenty-five thousand, eight hundred sixty-five".