1021442243 has 4 divisors (see below), whose sum is σ = 1024928688. Its totient is φ = 1017955800.

The previous prime is 1021442221. The next prime is 1021442249. The reversal of 1021442243 is 3422441201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422441201 = 4349 ⋅786949.

It is a cyclic number.

It is not a de Polignac number, because 1021442243 - 2⁶ = 1021442179 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1021442249) 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 3 ways as a sum of consecutive naturals, for example, 1742783 + ... + 1743368.

It is an arithmetic number, because the mean of its divisors is an integer number (256232172).

Almost surely, 2^1021442243 is an apocalyptic number.

1021442243 is a deficient number, since it is larger than the sum of its proper divisors (3486445).

1021442243 is an equidigital number, since it uses as much as digits as its factorization.

1021442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486444.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1021442243 is about 31960.0100594477. The cubic root of 1021442243 is about 1007.0969287862.

Adding to 1021442243 its reverse (3422441201), we get a palindrome (4443883444).

The spelling of 1021442243 in words is "one billion, twenty-one million, four hundred forty-two thousand, two hundred forty-three".