1005405442 has 16 divisors (see below), whose sum is σ = 1541461752. Its totient is φ = 491645440.

The previous prime is 1005405439. The next prime is 1005405451. The reversal of 1005405442 is 2445045001.

It is a happy number.

1005405442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 788991921 + 216413521 = 28089^2 + 14711^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18642 + ... + 48562.

Almost surely, 2^1005405442 is an apocalyptic number.

1005405442 is a deficient number, since it is larger than the sum of its proper divisors (536056310).

1005405442 is a wasteful number, since it uses less digits than its factorization.

1005405442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30293.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1005405442 is about 31708.1289577294. The cubic root of 1005405442 is about 1001.7985771807.

The spelling of 1005405442 in words is "one billion, five million, four hundred five thousand, four hundred forty-two".