71261611 has 2 divisors, whose sum is σ = 71261612. Its totient is φ = 71261610.

The previous prime is 71261587. The next prime is 71261623. The reversal of 71261611 is 11616217.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71261611 - 2⁵ = 71261579 is a prime.

It is not a weakly prime, because it can be changed into another prime (71261681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35630805 + 35630806.

It is an arithmetic number, because the mean of its divisors is an integer number (35630806).

Almost surely, 2^71261611 is an apocalyptic number.

71261611 is a deficient number, since it is larger than the sum of its proper divisors (1).

71261611 is an equidigital number, since it uses as much as digits as its factorization.

71261611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 71261611 is about 8441.6592563311. The cubic root of 71261611 is about 414.5897353545.

Adding to 71261611 its reverse (11616217), we get a palindrome (82877828).

The spelling of 71261611 in words is "seventy-one million, two hundred sixty-one thousand, six hundred eleven".