405424 has 10 divisors (see below), whose sum is σ = 785540. Its totient is φ = 202704.

The previous prime is 405413. The next prime is 405437. The reversal of 405424 is 424504.

405424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12654 + ... + 12685.

It is an arithmetic number, because the mean of its divisors is an integer number (78554).

2⁴⁰⁵⁴²⁴ is an apocalyptic number.

It is an amenable number.

405424 is a deficient number, since it is larger than the sum of its proper divisors (380116).

405424 is a wasteful number, since it uses less digits than its factorization.

405424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25347 (or 25341 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 405424 is about 636.7291417864. The cubic root of 405424 is about 74.0121723341.

Adding to 405424 its reverse (424504), we get a palindrome (829928).

The spelling of 405424 in words is "four hundred five thousand, four hundred twenty-four".