1266258671 has 2 divisors, whose sum is σ = 1266258672. Its totient is φ = 1266258670.

The previous prime is 1266258641. The next prime is 1266258701. The reversal of 1266258671 is 1768526621.

It is a balanced prime because it is at equal distance from previous prime (1266258641) and next prime (1266258701).

It is an emirp because it is prime and its reverse (1768526621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266258671 - 2⁶ = 1266258607 is a prime.

It is a super-2 number, since 2×1266258671² = 3206822043765372482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266258641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633129335 + 633129336.

It is an arithmetic number, because the mean of its divisors is an integer number (633129336).

Almost surely, 2^1266258671 is an apocalyptic number.

1266258671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266258671 is an equidigital number, since it uses as much as digits as its factorization.

1266258671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 1266258671 is about 35584.5285341818. The cubic root of 1266258671 is about 1081.8676733838.

The spelling of 1266258671 in words is "one billion, two hundred sixty-six million, two hundred fifty-eight thousand, six hundred seventy-one".