1265090343997 has 2 divisors, whose sum is σ = 1265090343998. Its totient is φ = 1265090343996.

The previous prime is 1265090343967. The next prime is 1265090344013. The reversal of 1265090343997 is 7993430905621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036922670436 + 228167673561 = 1018294^2 + 477669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265090343997 - 2³⁹ = 715334530109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265090343917) 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, 632545171998 + 632545171999.

It is an arithmetic number, because the mean of its divisors is an integer number (632545171999).

Almost surely, 2^{1265090343997} is an apocalyptic number.

It is an amenable number.

1265090343997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265090343997 is an equidigital number, since it uses as much as digits as its factorization.

1265090343997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11022480, while the sum is 58.

The spelling of 1265090343997 in words is "one trillion, two hundred sixty-five billion, ninety million, three hundred forty-three thousand, nine hundred ninety-seven".