425405 has 4 divisors (see below), whose sum is σ = 510492. Its totient is φ = 340320.

The previous prime is 425393. The next prime is 425417. The reversal of 425405 is 504524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (425393) and next prime (425417).

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 109561 = 562^2 + 331^2 .

It is not a de Polignac number, because 425405 - 2⁸ = 425149 is a prime.

It is a Duffinian number.

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 425405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42536 + ... + 42545.

It is an arithmetic number, because the mean of its divisors is an integer number (127623).

2⁴²⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

425405 is a deficient number, since it is larger than the sum of its proper divisors (85087).

425405 is an equidigital number, since it uses as much as digits as its factorization.

425405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85086.

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

The square root of 425405 is about 652.2307873751. The cubic root of 425405 is about 75.2086044364.

Adding to 425405 its reverse (504524), we get a palindrome (929929).

The spelling of 425405 in words is "four hundred twenty-five thousand, four hundred five".