1296127771 has 2 divisors, whose sum is σ = 1296127772. Its totient is φ = 1296127770.

The previous prime is 1296127757. The next prime is 1296127841. The reversal of 1296127771 is 1777216921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296127771 - 2⁵ = 1296127739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1296127171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648063885 + 648063886.

It is an arithmetic number, because the mean of its divisors is an integer number (648063886).

Almost surely, 2^1296127771 is an apocalyptic number.

1296127771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296127771 is an equidigital number, since it uses as much as digits as its factorization.

1296127771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 43.

The square root of 1296127771 is about 36001.7745534856. The cubic root of 1296127771 is about 1090.3081840458.

The spelling of 1296127771 in words is "one billion, two hundred ninety-six million, one hundred twenty-seven thousand, seven hundred seventy-one".