71559401 has 2 divisors, whose sum is σ = 71559402. Its totient is φ = 71559400.

The previous prime is 71559379. The next prime is 71559403. The reversal of 71559401 is 10495517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52940176 + 18619225 = 7276^2 + 4315^2 .

It is an emirp because it is prime and its reverse (10495517) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71559401 is a prime.

Together with 71559403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71559403) 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, 35779700 + 35779701.

It is an arithmetic number, because the mean of its divisors is an integer number (35779701).

Almost surely, 2^71559401 is an apocalyptic number.

It is an amenable number.

71559401 is a deficient number, since it is larger than the sum of its proper divisors (1).

71559401 is an equidigital number, since it uses as much as digits as its factorization.

71559401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 71559401 is about 8459.2789881881. The cubic root of 71559401 is about 415.1664324946.

The spelling of 71559401 in words is "seventy-one million, five hundred fifty-nine thousand, four hundred one".