1005242243 has 4 divisors (see below), whose sum is σ = 1005310368. Its totient is φ = 1005174120.

The previous prime is 1005242221. The next prime is 1005242263. The reversal of 1005242243 is 3422425001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1005242243 - 2²⁰ = 1004193667 is a prime.

It is a super-2 number, since 2×1005242243² = 2021023934223342098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005242263) 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, 1643 + ... + 44868.

It is an arithmetic number, because the mean of its divisors is an integer number (251327592).

Almost surely, 2^1005242243 is an apocalyptic number.

1005242243 is a deficient number, since it is larger than the sum of its proper divisors (68125).

1005242243 is an equidigital number, since it uses as much as digits as its factorization.

1005242243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68124.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1005242243 is about 31705.5553964916. Note that the first 3 decimals coincide. The cubic root of 1005242243 is about 1001.7443697383.

Adding to 1005242243 its reverse (3422425001), we get a palindrome (4427667244).

The spelling of 1005242243 in words is "one billion, five million, two hundred forty-two thousand, two hundred forty-three".