1005000511253 has 4 divisors (see below), whose sum is σ = 1005005474508. Its totient is φ = 1004995548000.

The previous prime is 1005000511181. The next prime is 1005000511271. The reversal of 1005000511253 is 3521150005001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 916496046244 + 88504465009 = 957338^2 + 297497^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005000511253 - 2¹⁰ = 1005000510229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005000511283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164376 + ... + 2587377.

It is an arithmetic number, because the mean of its divisors is an integer number (251251368627).

Almost surely, 2^{1005000511253} is an apocalyptic number.

It is an amenable number.

1005000511253 is a deficient number, since it is larger than the sum of its proper divisors (4963255).

1005000511253 is an equidigital number, since it uses as much as digits as its factorization.

1005000511253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4963254.

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 1005000511253 its reverse (3521150005001), we get a palindrome (4526150516254).

The spelling of 1005000511253 in words is "one trillion, five billion, five hundred eleven thousand, two hundred fifty-three".