4021234543 has 2 divisors, whose sum is σ = 4021234544. Its totient is φ = 4021234542.

The previous prime is 4021234541. The next prime is 4021234559. The reversal of 4021234543 is 3454321204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021234543 - 2¹ = 4021234541 is a prime.

Together with 4021234541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021234541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010617271 + 2010617272.

It is an arithmetic number, because the mean of its divisors is an integer number (2010617272).

Almost surely, 2^4021234543 is an apocalyptic number.

4021234543 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021234543 is an equidigital number, since it uses as much as digits as its factorization.

4021234543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 4021234543 is about 63413.2047999468. The cubic root of 4021234543 is about 1590.2050739538.

Adding to 4021234543 its reverse (3454321204), we get a palindrome (7475555747).

The spelling of 4021234543 in words is "four billion, twenty-one million, two hundred thirty-four thousand, five hundred forty-three".