425540 has 12 divisors (see below), whose sum is σ = 893676. Its totient is φ = 170208.

The previous prime is 425533. The next prime is 425549. The reversal of 425540 is 45524.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75076 + 350464 = 274^2 + 592^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 21277 = 425540 / (4 + 2 + 5 + 5 + 4 + 0).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425540.

It is not an unprimeable number, because it can be changed into a prime (425549) by changing a digit.

425540 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10619 + ... + 10658.

It is an arithmetic number, because the mean of its divisors is an integer number (74473).

2⁴²⁵⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

425540 is an abundant number, since it is smaller than the sum of its proper divisors (468136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

425540 is a wasteful number, since it uses less digits than its factorization.

425540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21286 (or 21284 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 425540 is about 652.3342701407. The cubic root of 425540 is about 75.2165592777.

The spelling of 425540 in words is "four hundred twenty-five thousand, five hundred forty".