421328040743 has 4 divisors (see below), whose sum is σ = 423466761960. Its totient is φ = 419189319528.

The previous prime is 421328040719. The next prime is 421328040767. The reversal of 421328040743 is 347040823124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (421328040719) and next prime (421328040767).

It is a cyclic number.

It is not a de Polignac number, because 421328040743 - 2²⁶ = 421260931879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421328040697 and 421328040706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421328030743) 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 in 3 ways as a sum of consecutive naturals, for example, 1069360313 + ... + 1069360706.

It is an arithmetic number, because the mean of its divisors is an integer number (105866690490).

Almost surely, 2^421328040743 is an apocalyptic number.

421328040743 is a deficient number, since it is larger than the sum of its proper divisors (2138721217).

421328040743 is a wasteful number, since it uses less digits than its factorization.

421328040743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138721216.

The product of its (nonzero) digits is 129024, while the sum is 38.

Adding to 421328040743 its reverse (347040823124), we get a palindrome (768368863867).

The spelling of 421328040743 in words is "four hundred twenty-one billion, three hundred twenty-eight million, forty thousand, seven hundred forty-three".