1243134423423 has 48 divisors (see below), whose sum is σ = 1994769683712. Its totient is φ = 742469760000.

The previous prime is 1243134423397. The next prime is 1243134423449. The reversal of 1243134423423 is 3243244313421.

1243134423423 is a `hidden beast` number, since 1 + 243 + 1 + 34 + 42 + 342 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1243134423397) and next prime (1243134423449).

It is not a de Polignac number, because 1243134423423 - 2¹⁶ = 1243134357887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243134423463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1859028 + ... + 2437673.

It is an arithmetic number, because the mean of its divisors is an integer number (41557701744).

Almost surely, 2^{1243134423423} is an apocalyptic number.

1243134423423 is a deficient number, since it is larger than the sum of its proper divisors (751635260289).

1243134423423 is a wasteful number, since it uses less digits than its factorization.

1243134423423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296816 (or 4296813 counting only the distinct ones).

The product of its digits is 165888, while the sum is 36.

Adding to 1243134423423 its reverse (3243244313421), we get a palindrome (4486378736844).

The spelling of 1243134423423 in words is "one trillion, two hundred forty-three billion, one hundred thirty-four million, four hundred twenty-three thousand, four hundred twenty-three".