1605225434 has 8 divisors (see below), whose sum is σ = 2409820308. Its totient is φ = 801952000.

The previous prime is 1605225403. The next prime is 1605225491. The reversal of 1605225434 is 4345225061.

It can be written as a sum of positive squares in 2 ways, for example, as 1528575409 + 76650025 = 39097^2 + 8755^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1605225434.

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, 327317 + ... + 332184.

Almost surely, 2^1605225434 is an apocalyptic number.

1605225434 is a deficient number, since it is larger than the sum of its proper divisors (804594874).

1605225434 is a wasteful number, since it uses less digits than its factorization.

1605225434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660720.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1605225434 is about 40065.2646815168. The cubic root of 1605225434 is about 1170.8789834789.

The spelling of 1605225434 in words is "one billion, six hundred five million, two hundred twenty-five thousand, four hundred thirty-four".