65371021 has 2 divisors, whose sum is σ = 65371022. Its totient is φ = 65371020.

The previous prime is 65371003. The next prime is 65371079. The reversal of 65371021 is 12017356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39513796 + 25857225 = 6286^2 + 5085^2 .

It is a cyclic number.

It is not a de Polignac number, because 65371021 - 2²¹ = 63273869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65371721) 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, 32685510 + 32685511.

It is an arithmetic number, because the mean of its divisors is an integer number (32685511).

Almost surely, 2^65371021 is an apocalyptic number.

It is an amenable number.

65371021 is a deficient number, since it is larger than the sum of its proper divisors (1).

65371021 is an equidigital number, since it uses as much as digits as its factorization.

65371021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 65371021 is about 8085.2347523124. The cubic root of 65371021 is about 402.8361370397.

Adding to 65371021 its reverse (12017356), we get a palindrome (77388377).

The spelling of 65371021 in words is "sixty-five million, three hundred seventy-one thousand, twenty-one".