1605045406 has 16 divisors (see below), whose sum is σ = 2535062400. Its totient is φ = 760050648.

The previous prime is 1605045401. The next prime is 1605045437. The reversal of 1605045406 is 6045405061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605045401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237705 + ... + 244363.

It is an arithmetic number, because the mean of its divisors is an integer number (158441400).

Almost surely, 2^1605045406 is an apocalyptic number.

1605045406 is a deficient number, since it is larger than the sum of its proper divisors (930016994).

1605045406 is a wasteful number, since it uses less digits than its factorization.

1605045406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13023.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1605045406 is about 40063.0179342495. The cubic root of 1605045406 is about 1170.8352100047.

The spelling of 1605045406 in words is "one billion, six hundred five million, forty-five thousand, four hundred six".