265299257 has 2 divisors, whose sum is σ = 265299258. Its totient is φ = 265299256.

The previous prime is 265299247. The next prime is 265299277. The reversal of 265299257 is 752992562.

265299257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261824761 + 3474496 = 16181^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 265299257 - 2¹⁴ = 265282873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (265299247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132649628 + 132649629.

It is an arithmetic number, because the mean of its divisors is an integer number (132649629).

Almost surely, 2^265299257 is an apocalyptic number.

It is an amenable number.

265299257 is a deficient number, since it is larger than the sum of its proper divisors (1).

265299257 is an equidigital number, since it uses as much as digits as its factorization.

265299257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 265299257 is about 16288.0096082978. The cubic root of 265299257 is about 642.5575209293.

The spelling of 265299257 in words is "two hundred sixty-five million, two hundred ninety-nine thousand, two hundred fifty-seven".