405422 has 16 divisors (see below), whose sum is σ = 656640. Its totient is φ = 187128.

The previous prime is 405413. The next prime is 405437. The reversal of 405422 is 224504.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 405422.

It is a congruent number.

It is an unprimeable number.

405422 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 7 ways as a sum of consecutive naturals, for example, 1673 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2⁴⁰⁵⁴²² is an apocalyptic number.

405422 is a deficient number, since it is larger than the sum of its proper divisors (251218).

405422 is a wasteful number, since it uses less digits than its factorization.

405422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 405422 is about 636.7275712579. The cubic root of 405422 is about 74.0120506306.

Adding to 405422 its reverse (224504), we get a palindrome (629926).

The spelling of 405422 in words is "four hundred five thousand, four hundred twenty-two".