71071730 has 16 divisors (see below), whose sum is σ = 135454680. Its totient is φ = 26756352.

The previous prime is 71071729. The next prime is 71071739. The reversal of 71071730 is 3717017.

It can be written as a sum of positive squares in 4 ways, for example, as 70543201 + 528529 = 8399^2 + 727^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71071730.

It is not an unprimeable number, because it can be changed into a prime (71071739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208865 + ... + 209204.

Almost surely, 2^71071730 is an apocalyptic number.

71071730 is a deficient number, since it is larger than the sum of its proper divisors (64382950).

71071730 is a wasteful number, since it uses less digits than its factorization.

71071730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418093.

The product of its (nonzero) digits is 1029, while the sum is 26.

The square root of 71071730 is about 8430.4050910973. The cubic root of 71071730 is about 414.2211744204.

Adding to 71071730 its reverse (3717017), we get a palindrome (74788747).

The spelling of 71071730 in words is "seventy-one million, seventy-one thousand, seven hundred thirty".