1243430343421 has 8 divisors (see below), whose sum is σ = 1431286727360. Its totient is φ = 1058129828928.

The previous prime is 1243430343403. The next prime is 1243430343457.

1243430343421 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243430343421 - 2⁷ = 1243430343293 is a prime.

It is a super-2 number, since 2×1243430343421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243430346421) 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 7 ways as a sum of consecutive naturals, for example, 638966316 + ... + 638968261.

It is an arithmetic number, because the mean of its divisors is an integer number (178910840920).

Almost surely, 2^{1243430343421} is an apocalyptic number.

It is an amenable number.

1243430343421 is a deficient number, since it is larger than the sum of its proper divisors (187856383939).

1243430343421 is a wasteful number, since it uses less digits than its factorization.

1243430343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277934723.

The product of its (nonzero) digits is 82944, while the sum is 34.

It can be divided in two parts, 1243430 and 343421, that added together give a palindrome (1586851).

The spelling of 1243430343421 in words is "one trillion, two hundred forty-three billion, four hundred thirty million, three hundred forty-three thousand, four hundred twenty-one".