1005023243 has 8 divisors (see below), whose sum is σ = 1158763488. Its totient is φ = 853824384.

The previous prime is 1005023213. The next prime is 1005023293. The reversal of 1005023243 is 3423205001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1005023243 - 2⁸ = 1005022987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005023213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634496 + ... + 636077.

It is an arithmetic number, because the mean of its divisors is an integer number (144845436).

Almost surely, 2^1005023243 is an apocalyptic number.

1005023243 is a deficient number, since it is larger than the sum of its proper divisors (153740245).

1005023243 is a wasteful number, since it uses less digits than its factorization.

1005023243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270693.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1005023243 is about 31702.1015549443. The cubic root of 1005023243 is about 1001.6716184680.

Adding to 1005023243 its reverse (3423205001), we get a palindrome (4428228244).

The spelling of 1005023243 in words is "one billion, five million, twenty-three thousand, two hundred forty-three".