1272064349 has 2 divisors, whose sum is σ = 1272064350. Its totient is φ = 1272064348.

The previous prime is 1272064337. The next prime is 1272064357. The reversal of 1272064349 is 9434602721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1139400025 + 132664324 = 33755^2 + 11518^2 .

It is an emirp because it is prime and its reverse (9434602721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272064349 - 2⁴ = 1272064333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272064309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636032174 + 636032175.

It is an arithmetic number, because the mean of its divisors is an integer number (636032175).

Almost surely, 2^1272064349 is an apocalyptic number.

It is an amenable number.

1272064349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272064349 is an equidigital number, since it uses as much as digits as its factorization.

1272064349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1272064349 is about 35666.0111170285. The cubic root of 1272064349 is about 1083.5185736939.

The spelling of 1272064349 in words is "one billion, two hundred seventy-two million, sixty-four thousand, three hundred forty-nine".