1242054343 has 2 divisors, whose sum is σ = 1242054344. Its totient is φ = 1242054342.

The previous prime is 1242054337. The next prime is 1242054389. The reversal of 1242054343 is 3434502421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242054343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242054743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621027171 + 621027172.

It is an arithmetic number, because the mean of its divisors is an integer number (621027172).

Almost surely, 2^1242054343 is an apocalyptic number.

1242054343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242054343 is an equidigital number, since it uses as much as digits as its factorization.

1242054343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1242054343 is about 35242.7913622063. The cubic root of 1242054343 is about 1074.9300384973.

Adding to 1242054343 its reverse (3434502421), we get a palindrome (4676556764).

The spelling of 1242054343 in words is "one billion, two hundred forty-two million, fifty-four thousand, three hundred forty-three".