71116261 has 4 divisors (see below), whose sum is σ = 71435392. Its totient is φ = 70797132.

The previous prime is 71116231. The next prime is 71116267. The reversal of 71116261 is 16261117.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16261117 = 757 ⋅21481.

It is a cyclic number.

It is not a de Polignac number, because 71116261 - 2²³ = 62727653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71116267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159231 + ... + 159676.

It is an arithmetic number, because the mean of its divisors is an integer number (17858848).

Almost surely, 2^71116261 is an apocalyptic number.

It is an amenable number.

71116261 is a deficient number, since it is larger than the sum of its proper divisors (319131).

71116261 is a wasteful number, since it uses less digits than its factorization.

71116261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319130.

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

The square root of 71116261 is about 8433.0457724360. The cubic root of 71116261 is about 414.3076684079.

Adding to 71116261 its reverse (16261117), we get a palindrome (87377378).

The spelling of 71116261 in words is "seventy-one million, one hundred sixteen thousand, two hundred sixty-one".