71025240 has 128 divisors (see below), whose sum is σ = 250387200. Its totient is φ = 15889920.

The previous prime is 71025223. The next prime is 71025271. The reversal of 71025240 is 4252017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15091 + ... + 19229.

It is an arithmetic number, because the mean of its divisors is an integer number (1956150).

Almost surely, 2^71025240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71025240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125193600).

71025240 is an abundant number, since it is smaller than the sum of its proper divisors (179361960).

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

71025240 is a wasteful number, since it uses less digits than its factorization.

71025240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177 (or 4173 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 71025240 is about 8427.6473585456. The cubic root of 71025240 is about 414.1308368473.

Adding to 71025240 its reverse (4252017), we get a palindrome (75277257).

The spelling of 71025240 in words is "seventy-one million, twenty-five thousand, two hundred forty".