1266750313 has 2 divisors, whose sum is σ = 1266750314. Its totient is φ = 1266750312.

The previous prime is 1266750269. The next prime is 1266750337. The reversal of 1266750313 is 3130576621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1255780969 + 10969344 = 35437^2 + 3312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266750313 - 2²¹ = 1264653161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266750013) 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, 633375156 + 633375157.

It is an arithmetic number, because the mean of its divisors is an integer number (633375157).

Almost surely, 2^1266750313 is an apocalyptic number.

It is an amenable number.

1266750313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266750313 is an equidigital number, since it uses as much as digits as its factorization.

1266750313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 1266750313 is about 35591.4359502395. The cubic root of 1266750313 is about 1082.0076718364.

The spelling of 1266750313 in words is "one billion, two hundred sixty-six million, seven hundred fifty thousand, three hundred thirteen".