1005139105 has 8 divisors (see below), whose sum is σ = 1206433512. Its totient is φ = 803933568.

The previous prime is 1005139103. The next prime is 1005139111. The reversal of 1005139105 is 5019315001.

It can be written as a sum of positive squares in 4 ways, for example, as 26450449 + 978688656 = 5143^2 + 31284^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1005139105 - 2¹ = 1005139103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005139105.

It is not an unprimeable number, because it can be changed into a prime (1005139103) 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, 5907 + ... + 45223.

It is an arithmetic number, because the mean of its divisors is an integer number (150804189).

Almost surely, 2^1005139105 is an apocalyptic number.

It is an amenable number.

1005139105 is a deficient number, since it is larger than the sum of its proper divisors (201294407).

1005139105 is an equidigital number, since it uses as much as digits as its factorization.

1005139105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44435.

The product of its (nonzero) digits is 675, while the sum is 25.

The square root of 1005139105 is about 31703.9288574776. The cubic root of 1005139105 is about 1001.7101088606.

The spelling of 1005139105 in words is "one billion, five million, one hundred thirty-nine thousand, one hundred five".