1243434202342 has 4 divisors (see below), whose sum is σ = 1865151303516. Its totient is φ = 621717101170.

The previous prime is 1243434202333. The next prime is 1243434202487. The reversal of 1243434202342 is 2432024343421.

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

It is a super-2 number, since 2×1243434202342² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243434202298 and 1243434202307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310858550584 + ... + 310858550587.

It is an arithmetic number, because the mean of its divisors is an integer number (466287825879).

Almost surely, 2^{1243434202342} is an apocalyptic number.

1243434202342 is a deficient number, since it is larger than the sum of its proper divisors (621717101174).

1243434202342 is an equidigital number, since it uses as much as digits as its factorization.

1243434202342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621717101173.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 1243434202342 its reverse (2432024343421), we get a palindrome (3675458545763).

The spelling of 1243434202342 in words is "one trillion, two hundred forty-three billion, four hundred thirty-four million, two hundred two thousand, three hundred forty-two".