139005241 has 2 divisors, whose sum is σ = 139005242. Its totient is φ = 139005240.

The previous prime is 139005203. The next prime is 139005247. The reversal of 139005241 is 142500931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86862400 + 52142841 = 9320^2 + 7221^2 .

It is a cyclic number.

It is not a de Polignac number, because 139005241 - 2⁹ = 139004729 is a prime.

It is not a weakly prime, because it can be changed into another prime (139005247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69502620 + 69502621.

It is an arithmetic number, because the mean of its divisors is an integer number (69502621).

Almost surely, 2^139005241 is an apocalyptic number.

It is an amenable number.

139005241 is a deficient number, since it is larger than the sum of its proper divisors (1).

139005241 is an equidigital number, since it uses as much as digits as its factorization.

139005241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 139005241 is about 11790.0483883655. The cubic root of 139005241 is about 518.0166571866.

The spelling of 139005241 in words is "one hundred thirty-nine million, five thousand, two hundred forty-one".