71321141 has 2 divisors, whose sum is σ = 71321142. Its totient is φ = 71321140.

The previous prime is 71321113. The next prime is 71321143. The reversal of 71321141 is 14112317.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53597041 + 17724100 = 7321^2 + 4210^2 .

It is a cyclic number.

It is not a de Polignac number, because 71321141 - 2⁶ = 71321077 is a prime.

Together with 71321143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71321143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35660570 + 35660571.

It is an arithmetic number, because the mean of its divisors is an integer number (35660571).

Almost surely, 2^71321141 is an apocalyptic number.

It is an amenable number.

71321141 is a deficient number, since it is larger than the sum of its proper divisors (1).

71321141 is an equidigital number, since it uses as much as digits as its factorization.

71321141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 20.

The square root of 71321141 is about 8445.1844858475. The cubic root of 71321141 is about 414.7051488631.

Adding to 71321141 its reverse (14112317), we get a palindrome (85433458).

The spelling of 71321141 in words is "seventy-one million, three hundred twenty-one thousand, one hundred forty-one".