1266241247 has 2 divisors, whose sum is σ = 1266241248. Its totient is φ = 1266241246.

The previous prime is 1266241237. The next prime is 1266241307. The reversal of 1266241247 is 7421426621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266241247 - 2²² = 1262046943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266241237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633120623 + 633120624.

It is an arithmetic number, because the mean of its divisors is an integer number (633120624).

Almost surely, 2^1266241247 is an apocalyptic number.

1266241247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266241247 is an equidigital number, since it uses as much as digits as its factorization.

1266241247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 1266241247 is about 35584.2837078393. The cubic root of 1266241247 is about 1081.8627111147.

Adding to 1266241247 its reverse (7421426621), we get a palindrome (8687667868).

The spelling of 1266241247 in words is "one billion, two hundred sixty-six million, two hundred forty-one thousand, two hundred forty-seven".