1266272263 has 2 divisors, whose sum is σ = 1266272264. Its totient is φ = 1266272262.

The previous prime is 1266272243. The next prime is 1266272279. The reversal of 1266272263 is 3622726621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266272263 - 2¹³ = 1266264071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266272243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633136131 + 633136132.

It is an arithmetic number, because the mean of its divisors is an integer number (633136132).

Almost surely, 2^1266272263 is an apocalyptic number.

1266272263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266272263 is an equidigital number, since it uses as much as digits as its factorization.

1266272263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 1266272263 is about 35584.7195155449. The cubic root of 1266272263 is about 1081.8715442866.

Adding to 1266272263 its reverse (3622726621), we get a palindrome (4888998884).

It can be divided in two parts, 1266 and 272263, that added together give a square (273529 = 523²).

The spelling of 1266272263 in words is "one billion, two hundred sixty-six million, two hundred seventy-two thousand, two hundred sixty-three".