1242453203434 has 4 divisors (see below), whose sum is σ = 1863679805154. Its totient is φ = 621226601716.

The previous prime is 1242453203413. The next prime is 1242453203437. The reversal of 1242453203434 is 4343023542421.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1149083234209 + 93369969225 = 1071953^2 + 305565^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1242453203393 and 1242453203402.

It is not an unprimeable number, because it can be changed into a prime (1242453203437) 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, 310613300857 + ... + 310613300860.

Almost surely, 2^{1242453203434} is an apocalyptic number.

1242453203434 is a deficient number, since it is larger than the sum of its proper divisors (621226601720).

1242453203434 is an equidigital number, since it uses as much as digits as its factorization.

1242453203434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621226601719.

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 1242453203434 its reverse (4343023542421), we get a palindrome (5585476745855).

The spelling of 1242453203434 in words is "one trillion, two hundred forty-two billion, four hundred fifty-three million, two hundred three thousand, four hundred thirty-four".