71261012 has 6 divisors (see below), whose sum is σ = 124706778. Its totient is φ = 35630504.

The previous prime is 71260979. The next prime is 71261053. The reversal of 71261012 is 21016217.

It can be written as a sum of positive squares in only one way, i.e., 59660176 + 11600836 = 7724^2 + 3406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8907623 + ... + 8907630.

It is an arithmetic number, because the mean of its divisors is an integer number (20784463).

Almost surely, 2^71261012 is an apocalyptic number.

It is an amenable number.

71261012 is a deficient number, since it is larger than the sum of its proper divisors (53445766).

71261012 is a wasteful number, since it uses less digits than its factorization.

71261012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17815257 (or 17815255 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 71261012 is about 8441.6237774495. The cubic root of 71261012 is about 414.5885737195.

Adding to 71261012 its reverse (21016217), we get a palindrome (92277229).

The spelling of 71261012 in words is "seventy-one million, two hundred sixty-one thousand, twelve".