1020434243 has 4 divisors (see below), whose sum is σ = 1020882720. Its totient is φ = 1019985768.

The previous prime is 1020434221. The next prime is 1020434257. The reversal of 1020434243 is 3424340201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424340201 = 149 ⋅22982149.

It is a cyclic number.

It is not a de Polignac number, because 1020434243 - 2⁸ = 1020433987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020434203) 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, 220808 + ... + 225381.

It is an arithmetic number, because the mean of its divisors is an integer number (255220680).

Almost surely, 2^1020434243 is an apocalyptic number.

1020434243 is a deficient number, since it is larger than the sum of its proper divisors (448477).

1020434243 is an equidigital number, since it uses as much as digits as its factorization.

1020434243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448476.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1020434243 is about 31944.2364598060. The cubic root of 1020434243 is about 1006.7655385956.

Adding to 1020434243 its reverse (3424340201), we get a palindrome (4444774444).

The spelling of 1020434243 in words is "one billion, twenty million, four hundred thirty-four thousand, two hundred forty-three".