71745061 has 2 divisors, whose sum is σ = 71745062. Its totient is φ = 71745060.

The previous prime is 71745053. The next prime is 71745071. The reversal of 71745061 is 16054717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 3682561 = 8250^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 71745061 - 2³ = 71745053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71745001) 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, 35872530 + 35872531.

It is an arithmetic number, because the mean of its divisors is an integer number (35872531).

Almost surely, 2^71745061 is an apocalyptic number.

It is an amenable number.

71745061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71745061 is an equidigital number, since it uses as much as digits as its factorization.

71745061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 71745061 is about 8470.2456280795. The cubic root of 71745061 is about 415.5251705213.

Adding to 71745061 its reverse (16054717), we get a palindrome (87799778).

The spelling of 71745061 in words is "seventy-one million, seven hundred forty-five thousand, sixty-one".