65981241 has 6 divisors (see below), whose sum is σ = 95306250. Its totient is φ = 43987488.

The previous prime is 65981207. The next prime is 65981257. The reversal of 65981241 is 14218956.

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 13838400 = 7221^2 + 3720^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65981241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65981196 and 65981205.

It is not an unprimeable number, because it can be changed into a prime (65981441) 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 in 5 ways as a sum of consecutive naturals, for example, 3665616 + ... + 3665633.

It is an arithmetic number, because the mean of its divisors is an integer number (15884375).

Almost surely, 2^65981241 is an apocalyptic number.

It is an amenable number.

65981241 is a deficient number, since it is larger than the sum of its proper divisors (29325009).

65981241 is a wasteful number, since it uses less digits than its factorization.

65981241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331255 (or 7331252 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 65981241 is about 8122.8837859470. The cubic root of 65981241 is about 404.0857107465.

The spelling of 65981241 in words is "sixty-five million, nine hundred eighty-one thousand, two hundred forty-one".