71135641 has 2 divisors, whose sum is σ = 71135642. Its totient is φ = 71135640.

The previous prime is 71135609. The next prime is 71135657. The reversal of 71135641 is 14653117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46185616 + 24950025 = 6796^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 71135641 - 2⁵ = 71135609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71135741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35567820 + 35567821.

It is an arithmetic number, because the mean of its divisors is an integer number (35567821).

Almost surely, 2^71135641 is an apocalyptic number.

It is an amenable number.

71135641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71135641 is an equidigital number, since it uses as much as digits as its factorization.

71135641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 71135641 is about 8434.1947452024. The cubic root of 71135641 is about 414.3452995266.

Adding to 71135641 its reverse (14653117), we get a palindrome (85788758).

The spelling of 71135641 in words is "seventy-one million, one hundred thirty-five thousand, six hundred forty-one".