1243460005 has 4 divisors (see below), whose sum is σ = 1492152012. Its totient is φ = 994768000.

The previous prime is 1243459993. The next prime is 1243460021. The reversal of 1243460005 is 5000643421.

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 543169636 + 700290369 = 23306^2 + 26463^2 .

It is not a de Polignac number, because 1243460005 - 2²⁵ = 1209905573 is a prime.

It is a Duffinian number.

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, 124345996 + ... + 124346005.

It is an arithmetic number, because the mean of its divisors is an integer number (373038003).

Almost surely, 2^1243460005 is an apocalyptic number.

It is an amenable number.

1243460005 is a deficient number, since it is larger than the sum of its proper divisors (248692007).

1243460005 is an equidigital number, since it uses as much as digits as its factorization.

1243460005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248692006.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1243460005 is about 35262.7282693781. The cubic root of 1243460005 is about 1075.3353934555.

The spelling of 1243460005 in words is "one billion, two hundred forty-three million, four hundred sixty thousand, five".