71507012 has 6 divisors (see below), whose sum is σ = 125137278. Its totient is φ = 35753504.

The previous prime is 71506999. The next prime is 71507027. The reversal of 71507012 is 21070517.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46566976 + 24940036 = 6824^2 + 4994^2 .

It is a super-2 number, since 2×71507012² = 10226505530336288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8938373 + ... + 8938380.

It is an arithmetic number, because the mean of its divisors is an integer number (20856213).

Almost surely, 2^71507012 is an apocalyptic number.

It is an amenable number.

71507012 is a deficient number, since it is larger than the sum of its proper divisors (53630266).

71507012 is a wasteful number, since it uses less digits than its factorization.

71507012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17876757 (or 17876755 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 71507012 is about 8456.1818807308. The cubic root of 71507012 is about 415.0650926106.

Adding to 71507012 its reverse (21070517), we get a palindrome (92577529).

The spelling of 71507012 in words is "seventy-one million, five hundred seven thousand, twelve".