71180072 has 8 divisors (see below), whose sum is σ = 133462650. Its totient is φ = 35590032.

The previous prime is 71180069. The next prime is 71180089. The reversal of 71180072 is 27008117.

It can be written as a sum of positive squares in only one way, i.e., 55860676 + 15319396 = 7474^2 + 3914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 4448747 + ... + 4448762.

Almost surely, 2^71180072 is an apocalyptic number.

It is an amenable number.

71180072 is a deficient number, since it is larger than the sum of its proper divisors (62282578).

71180072 is a wasteful number, since it uses less digits than its factorization.

71180072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897515 (or 8897511 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 71180072 is about 8436.8283140052. The cubic root of 71180072 is about 414.4315476398.

Adding to 71180072 its reverse (27008117), we get a palindrome (98188189).

The spelling of 71180072 in words is "seventy-one million, one hundred eighty thousand, seventy-two".