1265276267 has 2 divisors, whose sum is σ = 1265276268. Its totient is φ = 1265276266.

The previous prime is 1265276219. The next prime is 1265276279. The reversal of 1265276267 is 7626725621.

It is a strong prime.

It is an emirp because it is prime and its reverse (7626725621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265276267 - 2⁶ = 1265276203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265276167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632638133 + 632638134.

It is an arithmetic number, because the mean of its divisors is an integer number (632638134).

Almost surely, 2^1265276267 is an apocalyptic number.

1265276267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265276267 is an equidigital number, since it uses as much as digits as its factorization.

1265276267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 1265276267 is about 35570.7220477741. The cubic root of 1265276267 is about 1081.5878184768.

The spelling of 1265276267 in words is "one billion, two hundred sixty-five million, two hundred seventy-six thousand, two hundred sixty-seven".