1272744901 has 2 divisors, whose sum is σ = 1272744902. Its totient is φ = 1272744900.

The previous prime is 1272744881. The next prime is 1272744923. The reversal of 1272744901 is 1094472721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806616801 + 466128100 = 28401^2 + 21590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272744901 - 2¹⁹ = 1272220613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272744971) 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, 636372450 + 636372451.

It is an arithmetic number, because the mean of its divisors is an integer number (636372451).

Almost surely, 2^1272744901 is an apocalyptic number.

It is an amenable number.

1272744901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272744901 is an equidigital number, since it uses as much as digits as its factorization.

1272744901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1272744901 is about 35675.5504652696. The cubic root of 1272744901 is about 1083.7117660354.

The spelling of 1272744901 in words is "one billion, two hundred seventy-two million, seven hundred forty-four thousand, nine hundred one".