1266434497 has 2 divisors, whose sum is σ = 1266434498. Its totient is φ = 1266434496.

The previous prime is 1266434479. The next prime is 1266434539. The reversal of 1266434497 is 7944346621.

Together with previous prime (1266434479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130035456 + 136399041 = 33616^2 + 11679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266434497 - 2¹¹ = 1266432449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266434467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633217248 + 633217249.

It is an arithmetic number, because the mean of its divisors is an integer number (633217249).

Almost surely, 2^1266434497 is an apocalyptic number.

It is an amenable number.

1266434497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266434497 is an equidigital number, since it uses as much as digits as its factorization.

1266434497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 1266434497 is about 35586.9989883946. The cubic root of 1266434497 is about 1081.9177452125.

The spelling of 1266434497 in words is "one billion, two hundred sixty-six million, four hundred thirty-four thousand, four hundred ninety-seven".