405521434 has 8 divisors (see below), whose sum is σ = 644063508. Its totient is φ = 190833600.

The previous prime is 405521429. The next prime is 405521449. The reversal of 405521434 is 434125504.

It can be written as a sum of positive squares in 2 ways, for example, as 404613225 + 908209 = 20115^2 + 953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5963517 + ... + 5963584.

Almost surely, 2^405521434 is an apocalyptic number.

405521434 is a deficient number, since it is larger than the sum of its proper divisors (238542074).

405521434 is a wasteful number, since it uses less digits than its factorization.

405521434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11927120.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 405521434 is about 20137.5627621617. The cubic root of 405521434 is about 740.1810088006.

Adding to 405521434 its reverse (434125504), we get a palindrome (839646938).

The spelling of 405521434 in words is "four hundred five million, five hundred twenty-one thousand, four hundred thirty-four".