1275262649 has 2 divisors, whose sum is σ = 1275262650. Its totient is φ = 1275262648.

The previous prime is 1275262643. The next prime is 1275262699. The reversal of 1275262649 is 9462625721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015569424 + 259693225 = 31868^2 + 16115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275262649 - 2¹⁶ = 1275197113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1275262643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637631324 + 637631325.

It is an arithmetic number, because the mean of its divisors is an integer number (637631325).

Almost surely, 2^1275262649 is an apocalyptic number.

It is an amenable number.

1275262649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275262649 is an equidigital number, since it uses as much as digits as its factorization.

1275262649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 1275262649 is about 35710.8197749646. The cubic root of 1275262649 is about 1084.4258960285.

The spelling of 1275262649 in words is "one billion, two hundred seventy-five million, two hundred sixty-two thousand, six hundred forty-nine".