71307261 has 12 divisors (see below), whose sum is σ = 103963392. Its totient is φ = 47093256.

The previous prime is 71307233. The next prime is 71307263. The reversal of 71307261 is 16270317.

It is not a de Polignac number, because 71307261 - 2¹³ = 71299069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71307263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36061 + ... + 37986.

It is an arithmetic number, because the mean of its divisors is an integer number (8663616).

Almost surely, 2^71307261 is an apocalyptic number.

It is an amenable number.

71307261 is a deficient number, since it is larger than the sum of its proper divisors (32656131).

71307261 is a wasteful number, since it uses less digits than its factorization.

71307261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74160 (or 74157 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 71307261 is about 8444.3626757737. The cubic root of 71307261 is about 414.6782448211.

Adding to 71307261 its reverse (16270317), we get a palindrome (87577578).

The spelling of 71307261 in words is "seventy-one million, three hundred seven thousand, two hundred sixty-one".