1001405005 has 4 divisors (see below), whose sum is σ = 1201686012. Its totient is φ = 801124000.

The previous prime is 1001404993. The next prime is 1001405017. The reversal of 1001405005 is 5005041001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5005041001 = 3359 ⋅1490039.

It is an interprime number because it is at equal distance from previous prime (1001404993) and next prime (1001405017).

It can be written as a sum of positive squares in 2 ways, for example, as 457489321 + 543915684 = 21389^2 + 23322^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1001405005 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 1001405005.

It is a congruent number.

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, 100140496 + ... + 100140505.

It is an arithmetic number, because the mean of its divisors is an integer number (300421503).

Almost surely, 2^1001405005 is an apocalyptic number.

It is an amenable number.

1001405005 is a deficient number, since it is larger than the sum of its proper divisors (200281007).

1001405005 is an equidigital number, since it uses as much as digits as its factorization.

1001405005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200281006.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1001405005 is about 31644.9838837058. The cubic root of 1001405005 is about 1000.4681158334.

Adding to 1001405005 its reverse (5005041001), we get a palindrome (6006446006).

The spelling of 1001405005 in words is "one billion, one million, four hundred five thousand, five".