405425 has 6 divisors (see below), whose sum is σ = 502758. Its totient is φ = 324320.

The previous prime is 405413. The next prime is 405437. The reversal of 405425 is 524504.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (405413) and next prime (405437).

It can be written as a sum of positive squares in 3 ways, for example, as 65536 + 339889 = 256^2 + 583^2 .

It is not a de Polignac number, because 405425 - 2¹² = 401329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405397 and 405406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8084 + ... + 8133.

It is an arithmetic number, because the mean of its divisors is an integer number (83793).

2⁴⁰⁵⁴²⁵ is an apocalyptic number.

It is an amenable number.

405425 is a deficient number, since it is larger than the sum of its proper divisors (97333).

405425 is a wasteful number, since it uses less digits than its factorization.

405425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16227 (or 16222 counting only the distinct ones).

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

The square root of 405425 is about 636.7299270491. The cubic root of 405425 is about 74.0122331858.

Adding to 405425 its reverse (524504), we get a palindrome (929929).

The spelling of 405425 in words is "four hundred five thousand, four hundred twenty-five".