65501257 has 2 divisors, whose sum is σ = 65501258. Its totient is φ = 65501256.

The previous prime is 65501239. The next prime is 65501273. The reversal of 65501257 is 75210556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 8785296 = 7531^2 + 2964^2 .

It is a cyclic number.

It is not a de Polignac number, because 65501257 - 2¹¹ = 65499209 is a prime.

It is not a weakly prime, because it can be changed into another prime (65501237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750628 + 32750629.

It is an arithmetic number, because the mean of its divisors is an integer number (32750629).

Almost surely, 2^65501257 is an apocalyptic number.

It is an amenable number.

65501257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65501257 is an equidigital number, since it uses as much as digits as its factorization.

65501257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 65501257 is about 8093.2846854661. The cubic root of 65501257 is about 403.1034775441.

The spelling of 65501257 in words is "sixty-five million, five hundred one thousand, two hundred fifty-seven".