65294521 has 2 divisors, whose sum is σ = 65294522. Its totient is φ = 65294520.

The previous prime is 65294519. The next prime is 65294531. The reversal of 65294521 is 12549256.

It is a happy number.

65294521 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., 47955625 + 17338896 = 6925^2 + 4164^2 .

It is a cyclic number.

It is not a de Polignac number, because 65294521 - 2¹ = 65294519 is a prime.

Together with 65294519, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65294531) 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, 32647260 + 32647261.

It is an arithmetic number, because the mean of its divisors is an integer number (32647261).

Almost surely, 2^65294521 is an apocalyptic number.

It is an amenable number.

65294521 is a deficient number, since it is larger than the sum of its proper divisors (1).

65294521 is an equidigital number, since it uses as much as digits as its factorization.

65294521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 65294521 is about 8080.5025215020. The cubic root of 65294521 is about 402.6789369382.

The spelling of 65294521 in words is "sixty-five million, two hundred ninety-four thousand, five hundred twenty-one".