1273320143 has 2 divisors, whose sum is σ = 1273320144. Its totient is φ = 1273320142.

The previous prime is 1273320137. The next prime is 1273320151. The reversal of 1273320143 is 3410233721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1273320143 - 2⁴ = 1273320127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1273320943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636660071 + 636660072.

It is an arithmetic number, because the mean of its divisors is an integer number (636660072).

Almost surely, 2^1273320143 is an apocalyptic number.

1273320143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273320143 is an equidigital number, since it uses as much as digits as its factorization.

1273320143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 1273320143 is about 35683.6116865992. The cubic root of 1273320143 is about 1083.8750097009.

Adding to 1273320143 its reverse (3410233721), we get a palindrome (4683553864).

The spelling of 1273320143 in words is "one billion, two hundred seventy-three million, three hundred twenty thousand, one hundred forty-three".