71525252 has 12 divisors (see below), whose sum is σ = 129485580. Its totient is φ = 34529376.

The previous prime is 71525231. The next prime is 71525261. The reversal of 71525252 is 25252517.

It can be written as a sum of positive squares in 2 ways, for example, as 38738176 + 32787076 = 6224^2 + 5726^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 308183 + ... + 308414.

It is an arithmetic number, because the mean of its divisors is an integer number (10790465).

Almost surely, 2^71525252 is an apocalyptic number.

It is an amenable number.

71525252 is a deficient number, since it is larger than the sum of its proper divisors (57960328).

71525252 is a wasteful number, since it uses less digits than its factorization.

71525252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616630 (or 616628 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 71525252 is about 8457.2603128909. The cubic root of 71525252 is about 415.1003811949.

Adding to 71525252 its reverse (25252517), we get a palindrome (96777769).

The spelling of 71525252 in words is "seventy-one million, five hundred twenty-five thousand, two hundred fifty-two".