65247257 has 2 divisors, whose sum is σ = 65247258. Its totient is φ = 65247256.

The previous prime is 65247191. The next prime is 65247269. The reversal of 65247257 is 75274256.

It is a happy number.

65247257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 12988816 = 7229^2 + 3604^2 .

It is a cyclic number.

It is not a de Polignac number, because 65247257 - 2¹⁸ = 64985113 is a prime.

It is a super-3 number, since 3×65247257³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65247257.

It is not a weakly prime, because it can be changed into another prime (65247557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32623628 + 32623629.

It is an arithmetic number, because the mean of its divisors is an integer number (32623629).

Almost surely, 2^65247257 is an apocalyptic number.

It is an amenable number.

65247257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65247257 is an equidigital number, since it uses as much as digits as its factorization.

65247257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 38.

The square root of 65247257 is about 8077.5774214798. The cubic root of 65247257 is about 402.5817526158.

The spelling of 65247257 in words is "sixty-five million, two hundred forty-seven thousand, two hundred fifty-seven".