65265257 has 2 divisors, whose sum is σ = 65265258. Its totient is φ = 65265256.

The previous prime is 65265251. The next prime is 65265287. The reversal of 65265257 is 75256256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60668521 + 4596736 = 7789^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 65265257 - 2⁴ = 65265241 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 65265257.

It is not a weakly prime, because it can be changed into another prime (65265251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32632628 + 32632629.

It is an arithmetic number, because the mean of its divisors is an integer number (32632629).

Almost surely, 2^65265257 is an apocalyptic number.

It is an amenable number.

65265257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65265257 is an equidigital number, since it uses as much as digits as its factorization.

65265257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 38.

The square root of 65265257 is about 8078.6915400948. The cubic root of 65265257 is about 402.6187697800.

Subtracting 65265257 from its reverse (75256256), we obtain a palindrome (9990999).

The spelling of 65265257 in words is "sixty-five million, two hundred sixty-five thousand, two hundred fifty-seven".