1265373763 has 2 divisors, whose sum is σ = 1265373764. Its totient is φ = 1265373762.

The previous prime is 1265373757. The next prime is 1265373793. The reversal of 1265373763 is 3673735621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265373763 - 2¹³ = 1265365571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265373793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632686881 + 632686882.

It is an arithmetic number, because the mean of its divisors is an integer number (632686882).

Almost surely, 2^1265373763 is an apocalyptic number.

1265373763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265373763 is an equidigital number, since it uses as much as digits as its factorization.

1265373763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 43.

The square root of 1265373763 is about 35572.0924742979. The cubic root of 1265373763 is about 1081.6155983855.

The spelling of 1265373763 in words is "one billion, two hundred sixty-five million, three hundred seventy-three thousand, seven hundred sixty-three".