71251472 has 20 divisors (see below), whose sum is σ = 139274940. Its totient is φ = 35309568.

The previous prime is 71251469. The next prime is 71251489. The reversal of 71251472 is 27415217.

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 56010256 = 3904^2 + 7484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17897 + ... + 21512.

It is an arithmetic number, because the mean of its divisors is an integer number (6963747).

Almost surely, 2^71251472 is an apocalyptic number.

It is an amenable number.

71251472 is a deficient number, since it is larger than the sum of its proper divisors (68023468).

71251472 is a wasteful number, since it uses less digits than its factorization.

71251472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39530 (or 39524 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 71251472 is about 8441.0587013715. The cubic root of 71251472 is about 414.5700720106.

Adding to 71251472 its reverse (27415217), we get a palindrome (98666689).

The spelling of 71251472 in words is "seventy-one million, two hundred fifty-one thousand, four hundred seventy-two".