1020420043 has 2 divisors, whose sum is σ = 1020420044. Its totient is φ = 1020420042.

The previous prime is 1020420041. The next prime is 1020420067. The reversal of 1020420043 is 3400240201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020420043 - 2¹ = 1020420041 is a prime.

It is a super-2 number, since 2×1020420043² = 2082514128312243698, which contains 22 as substring.

Together with 1020420041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1020419999 and 1020420026.

It is not a weakly prime, because it can be changed into another prime (1020420041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510210021 + 510210022.

It is an arithmetic number, because the mean of its divisors is an integer number (510210022).

Almost surely, 2^1020420043 is an apocalyptic number.

1020420043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020420043 is an equidigital number, since it uses as much as digits as its factorization.

1020420043 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1020420043 is about 31944.0141967161. The cubic root of 1020420043 is about 1006.7608686436.

Adding to 1020420043 its reverse (3400240201), we get a palindrome (4420660244).

The spelling of 1020420043 in words is "one billion, twenty million, four hundred twenty thousand, forty-three".