71247412 has 6 divisors (see below), whose sum is σ = 124682978. Its totient is φ = 35623704.

The previous prime is 71247409. The next prime is 71247433. The reversal of 71247412 is 21474217.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 18887716 = 7236^2 + 4346^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8905923 + ... + 8905930.

Almost surely, 2^71247412 is an apocalyptic number.

It is an amenable number.

71247412 is a deficient number, since it is larger than the sum of its proper divisors (53435566).

71247412 is a wasteful number, since it uses less digits than its factorization.

71247412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17811857 (or 17811855 counting only the distinct ones).

The product of its digits is 3136, while the sum is 28.

The square root of 71247412 is about 8440.8182067854. The cubic root of 71247412 is about 414.5621976167.

The spelling of 71247412 in words is "seventy-one million, two hundred forty-seven thousand, four hundred twelve".