1040020243 has 4 divisors (see below), whose sum is σ = 1075883040. Its totient is φ = 1004157448.

The previous prime is 1040020213. The next prime is 1040020253. The reversal of 1040020243 is 3420200401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3420200401 = 809 ⋅4227689.

It is a cyclic number.

It is not a de Polignac number, because 1040020243 - 2²⁹ = 503149331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040020213) 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, 17931355 + ... + 17931412.

It is an arithmetic number, because the mean of its divisors is an integer number (268970760).

Almost surely, 2^1040020243 is an apocalyptic number.

1040020243 is a deficient number, since it is larger than the sum of its proper divisors (35862797).

1040020243 is an equidigital number, since it uses as much as digits as its factorization.

1040020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35862796.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1040020243 is about 32249.3448460585. The cubic root of 1040020243 is about 1013.1659772986.

Adding to 1040020243 its reverse (3420200401), we get a palindrome (4460220644).

The spelling of 1040020243 in words is "one billion, forty million, twenty thousand, two hundred forty-three".