1265735087 has 2 divisors, whose sum is σ = 1265735088. Its totient is φ = 1265735086.

The previous prime is 1265735069. The next prime is 1265735089. The reversal of 1265735087 is 7805375621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7805375621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265735087 is a prime.

Together with 1265735089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265735089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632867543 + 632867544.

It is an arithmetic number, because the mean of its divisors is an integer number (632867544).

Almost surely, 2^1265735087 is an apocalyptic number.

1265735087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265735087 is an equidigital number, since it uses as much as digits as its factorization.

1265735087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 1265735087 is about 35577.1708684094. The cubic root of 1265735087 is about 1081.7185393750.

The spelling of 1265735087 in words is "one billion, two hundred sixty-five million, seven hundred thirty-five thousand, eighty-seven".