71206261 has 12 divisors (see below), whose sum is σ = 82976268. Its totient is φ = 60927552.

The previous prime is 71206259. The next prime is 71206273. The reversal of 71206261 is 16260217.

It can be written as a sum of positive squares in 2 ways, for example, as 42380100 + 28826161 = 6510^2 + 5369^2 .

It is not a de Polignac number, because 71206261 - 2¹ = 71206259 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 (71206231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42145 + ... + 43801.

It is an arithmetic number, because the mean of its divisors is an integer number (6914689).

Almost surely, 2^71206261 is an apocalyptic number.

It is an amenable number.

71206261 is a deficient number, since it is larger than the sum of its proper divisors (11770007).

71206261 is a wasteful number, since it uses less digits than its factorization.

71206261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 71206261 is about 8438.3802355665. The cubic root of 71206261 is about 414.4823681230.

Adding to 71206261 its reverse (16260217), we get a palindrome (87466478).

The spelling of 71206261 in words is "seventy-one million, two hundred six thousand, two hundred sixty-one".