71280530 has 16 divisors (see below), whose sum is σ = 128418264. Its totient is φ = 28487040.

The previous prime is 71280499. The next prime is 71280569. The reversal of 71280530 is 3508217.

It can be written as a sum of positive squares in 4 ways, for example, as 61984129 + 9296401 = 7873^2 + 3049^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71280530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12404 + ... + 17216.

Almost surely, 2^71280530 is an apocalyptic number.

71280530 is a deficient number, since it is larger than the sum of its proper divisors (57137734).

71280530 is a wasteful number, since it uses less digits than its factorization.

71280530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71280530 is about 8442.7797555071. The cubic root of 71280530 is about 414.6264214424.

Adding to 71280530 its reverse (3508217), we get a palindrome (74788747).

The spelling of 71280530 in words is "seventy-one million, two hundred eighty thousand, five hundred thirty".