1005006243 has 4 divisors (see below), whose sum is σ = 1340008328. Its totient is φ = 670004160.

The previous prime is 1005006241. The next prime is 1005006253. The reversal of 1005006243 is 3426005001.

It is a happy number.

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

It is not a de Polignac number, because 1005006243 - 2¹ = 1005006241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005006241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167501038 + ... + 167501043.

It is an arithmetic number, because the mean of its divisors is an integer number (335002082).

Almost surely, 2^1005006243 is an apocalyptic number.

1005006243 is a deficient number, since it is larger than the sum of its proper divisors (335002085).

1005006243 is an equidigital number, since it uses as much as digits as its factorization.

1005006243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335002084.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1005006243 is about 31701.8334327843. The cubic root of 1005006243 is about 1001.6659706671.

The spelling of 1005006243 in words is "one billion, five million, six thousand, two hundred forty-three".