1265135567 has 2 divisors, whose sum is σ = 1265135568. Its totient is φ = 1265135566.

The previous prime is 1265135491. The next prime is 1265135591. The reversal of 1265135567 is 7655315621.

It is a strong prime.

It is an emirp because it is prime and its reverse (7655315621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265135567 - 2¹² = 1265131471 is a prime.

It is a super-2 number, since 2×1265135567² = 3201136005776822978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265135167) 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, 632567783 + 632567784.

It is an arithmetic number, because the mean of its divisors is an integer number (632567784).

Almost surely, 2^1265135567 is an apocalyptic number.

1265135567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265135567 is an equidigital number, since it uses as much as digits as its factorization.

1265135567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 41.

The square root of 1265135567 is about 35568.7442426634. The cubic root of 1265135567 is about 1081.5477257711.

The spelling of 1265135567 in words is "one billion, two hundred sixty-five million, one hundred thirty-five thousand, five hundred sixty-seven".