71280252 has 36 divisors (see below), whose sum is σ = 190781136. Its totient is φ = 22362240.

The previous prime is 71280227. The next prime is 71280271. The reversal of 71280252 is 25208217.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57624 + ... + 58847.

It is an arithmetic number, because the mean of its divisors is an integer number (5299476).

Almost surely, 2^71280252 is an apocalyptic number.

It is an amenable number.

71280252 is an abundant number, since it is smaller than the sum of its proper divisors (119500884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71280252 is a wasteful number, since it uses less digits than its factorization.

71280252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116498 (or 116493 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 71280252 is about 8442.7632917191. The cubic root of 71280252 is about 414.6258824159.

Adding to 71280252 its reverse (25208217), we get a palindrome (96488469).

The spelling of 71280252 in words is "seventy-one million, two hundred eighty thousand, two hundred fifty-two".