4321242643 has 4 divisors (see below), whose sum is σ = 4470251040. Its totient is φ = 4172234248.

The previous prime is 4321242589. The next prime is 4321242661. The reversal of 4321242643 is 3462421234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3462421234 = 2 ⋅1731210617.

It is a cyclic number.

It is not a de Polignac number, because 4321242643 - 2⁹ = 4321242131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4321248643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74504155 + ... + 74504212.

It is an arithmetic number, because the mean of its divisors is an integer number (1117562760).

Almost surely, 2^4321242643 is an apocalyptic number.

4321242643 is a deficient number, since it is larger than the sum of its proper divisors (149008397).

4321242643 is a wasteful number, since it uses less digits than its factorization.

4321242643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149008396.

The product of its digits is 27648, while the sum is 31.

The square root of 4321242643 is about 65736.1593265077. The cubic root of 4321242643 is about 1628.8067148034.

Adding to 4321242643 its reverse (3462421234), we get a palindrome (7783663877).

The spelling of 4321242643 in words is "four billion, three hundred twenty-one million, two hundred forty-two thousand, six hundred forty-three".