71160121 has 2 divisors, whose sum is σ = 71160122. Its totient is φ = 71160120.

The previous prime is 71160107. The next prime is 71160157. The reversal of 71160121 is 12106117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 4247721 = 8180^2 + 2061^2 .

It is an emirp because it is prime and its reverse (12106117) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71160121 is a prime.

It is not a weakly prime, because it can be changed into another prime (71160101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35580060 + 35580061.

It is an arithmetic number, because the mean of its divisors is an integer number (35580061).

Almost surely, 2^71160121 is an apocalyptic number.

It is an amenable number.

71160121 is a deficient number, since it is larger than the sum of its proper divisors (1).

71160121 is an equidigital number, since it uses as much as digits as its factorization.

71160121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 71160121 is about 8435.6458555347. The cubic root of 71160121 is about 414.3928238031.

Adding to 71160121 its reverse (12106117), we get a palindrome (83266238).

The spelling of 71160121 in words is "seventy-one million, one hundred sixty thousand, one hundred twenty-one".