71144761 has 2 divisors, whose sum is σ = 71144762. Its totient is φ = 71144760.

The previous prime is 71144729. The next prime is 71144771. The reversal of 71144761 is 16744117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60155536 + 10989225 = 7756^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 71144761 - 2⁵ = 71144729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71144701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35572380 + 35572381.

It is an arithmetic number, because the mean of its divisors is an integer number (35572381).

Almost surely, 2^71144761 is an apocalyptic number.

It is an amenable number.

71144761 is a deficient number, since it is larger than the sum of its proper divisors (1).

71144761 is an equidigital number, since it uses as much as digits as its factorization.

71144761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 71144761 is about 8434.7353841125. The cubic root of 71144761 is about 414.3630059234.

Adding to 71144761 its reverse (16744117), we get a palindrome (87888878).

The spelling of 71144761 in words is "seventy-one million, one hundred forty-four thousand, seven hundred sixty-one".