65139241 has 2 divisors, whose sum is σ = 65139242. Its totient is φ = 65139240.

The previous prime is 65139229. The next prime is 65139247. The reversal of 65139241 is 14293156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45954841 + 19184400 = 6779^2 + 4380^2 .

It is a cyclic number.

It is not a de Polignac number, because 65139241 - 2¹⁵ = 65106473 is a prime.

It is not a weakly prime, because it can be changed into another prime (65139247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32569620 + 32569621.

It is an arithmetic number, because the mean of its divisors is an integer number (32569621).

Almost surely, 2^65139241 is an apocalyptic number.

It is an amenable number.

65139241 is a deficient number, since it is larger than the sum of its proper divisors (1).

65139241 is an equidigital number, since it uses as much as digits as its factorization.

65139241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 65139241 is about 8070.8884888840. Note that the first 3 decimals coincide. The cubic root of 65139241 is about 402.3594735953.

The spelling of 65139241 in words is "sixty-five million, one hundred thirty-nine thousand, two hundred forty-one".