265902257 has 2 divisors, whose sum is σ = 265902258. Its totient is φ = 265902256.

The previous prime is 265902227. The next prime is 265902277. The reversal of 265902257 is 752209562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171112561 + 94789696 = 13081^2 + 9736^2 .

It is a cyclic number.

It is not a de Polignac number, because 265902257 - 2⁶ = 265902193 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265902257.

It is not a weakly prime, because it can be changed into another prime (265902227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132951128 + 132951129.

It is an arithmetic number, because the mean of its divisors is an integer number (132951129).

Almost surely, 2^265902257 is an apocalyptic number.

It is an amenable number.

265902257 is a deficient number, since it is larger than the sum of its proper divisors (1).

265902257 is an equidigital number, since it uses as much as digits as its factorization.

265902257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 265902257 is about 16306.5096510565. The cubic root of 265902257 is about 643.0439766205.

The spelling of 265902257 in words is "two hundred sixty-five million, nine hundred two thousand, two hundred fifty-seven".