1001043243 has 6 divisors (see below), whose sum is σ = 1445951364. Its totient is φ = 667362156.

The previous prime is 1001043223. The next prime is 1001043287. The reversal of 1001043243 is 3423401001.

It is not a de Polignac number, because 1001043243 - 2¹² = 1001039147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001043203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55613505 + ... + 55613522.

It is an arithmetic number, because the mean of its divisors is an integer number (240991894).

Almost surely, 2^1001043243 is an apocalyptic number.

1001043243 is a deficient number, since it is larger than the sum of its proper divisors (444908121).

1001043243 is a wasteful number, since it uses less digits than its factorization.

1001043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111227033 (or 111227030 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1001043243 is about 31639.2674219869. The cubic root of 1001043243 is about 1000.3476268083.

Adding to 1001043243 its reverse (3423401001), we get a palindrome (4424444244).

The spelling of 1001043243 in words is "one billion, one million, forty-three thousand, two hundred forty-three".