1244143543 has 2 divisors, whose sum is σ = 1244143544. Its totient is φ = 1244143542.

The previous prime is 1244143519. The next prime is 1244143559. The reversal of 1244143543 is 3453414421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244143543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244143843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622071771 + 622071772.

It is an arithmetic number, because the mean of its divisors is an integer number (622071772).

Almost surely, 2^1244143543 is an apocalyptic number.

1244143543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244143543 is an equidigital number, since it uses as much as digits as its factorization.

1244143543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 31.

The square root of 1244143543 is about 35272.4190125940. The cubic root of 1244143543 is about 1075.5323969667.

Adding to 1244143543 its reverse (3453414421), we get a palindrome (4697557964).

The spelling of 1244143543 in words is "one billion, two hundred forty-four million, one hundred forty-three thousand, five hundred forty-three".