1275326617 has 2 divisors, whose sum is σ = 1275326618. Its totient is φ = 1275326616.

The previous prime is 1275326599. The next prime is 1275326629. The reversal of 1275326617 is 7166235721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661724176 + 613602441 = 25724^2 + 24771^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275326617 - 2⁷ = 1275326489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275326617.

It is not a weakly prime, because it can be changed into another prime (1275326677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637663308 + 637663309.

It is an arithmetic number, because the mean of its divisors is an integer number (637663309).

Almost surely, 2^1275326617 is an apocalyptic number.

It is an amenable number.

1275326617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275326617 is an equidigital number, since it uses as much as digits as its factorization.

1275326617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 1275326617 is about 35711.7154026518. The cubic root of 1275326617 is about 1084.4440275603. Note that the first 3 decimals are identical.

The spelling of 1275326617 in words is "one billion, two hundred seventy-five million, three hundred twenty-six thousand, six hundred seventeen".