405434 has 4 divisors (see below), whose sum is σ = 608154. Its totient is φ = 202716.

The previous prime is 405413. The next prime is 405437. The reversal of 405434 is 434504.

It is a happy number.

405434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 403225 + 2209 = 635^2 + 47^2 .

It is not an unprimeable number, because it can be changed into a prime (405437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101357 + ... + 101360.

2⁴⁰⁵⁴³⁴ is an apocalyptic number.

405434 is a deficient number, since it is larger than the sum of its proper divisors (202720).

405434 is a wasteful number, since it uses less digits than its factorization.

405434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202719.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 405434 is about 636.7369943705. The cubic root of 405434 is about 74.0127808458.

Adding to 405434 its reverse (434504), we get a palindrome (839938).

The spelling of 405434 in words is "four hundred five thousand, four hundred thirty-four".