1272427043 has 2 divisors, whose sum is σ = 1272427044. Its totient is φ = 1272427042.

The previous prime is 1272427027. The next prime is 1272427081. The reversal of 1272427043 is 3407242721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1272427043 - 2⁴ = 1272427027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1272420043) by changing a digit.

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, 636213521 + 636213522.

It is an arithmetic number, because the mean of its divisors is an integer number (636213522).

Almost surely, 2^1272427043 is an apocalyptic number.

1272427043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272427043 is an equidigital number, since it uses as much as digits as its factorization.

1272427043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 1272427043 is about 35671.0953434290. The cubic root of 1272427043 is about 1083.6215423689.

Adding to 1272427043 its reverse (3407242721), we get a palindrome (4679669764).

The spelling of 1272427043 in words is "one billion, two hundred seventy-two million, four hundred twenty-seven thousand, forty-three".