265748261 has 2 divisors, whose sum is σ = 265748262. Its totient is φ = 265748260.

The previous prime is 265748239. The next prime is 265748297. The reversal of 265748261 is 162847562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219928900 + 45819361 = 14830^2 + 6769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265748261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265748761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132874130 + 132874131.

It is an arithmetic number, because the mean of its divisors is an integer number (132874131).

Almost surely, 2^265748261 is an apocalyptic number.

It is an amenable number.

265748261 is a deficient number, since it is larger than the sum of its proper divisors (1).

265748261 is an equidigital number, since it uses as much as digits as its factorization.

265748261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 265748261 is about 16301.7870492778. The cubic root of 265748261 is about 642.9198140500.

The spelling of 265748261 in words is "two hundred sixty-five million, seven hundred forty-eight thousand, two hundred sixty-one".