71225740 has 48 divisors (see below), whose sum is σ = 158961600. Its totient is φ = 26756352.

The previous prime is 71225731. The next prime is 71225741. The reversal of 71225740 is 4752217.

It is a junction number, because it is equal to n+sod(n) for n = 71225699 and 71225708.

It is not an unprimeable number, because it can be changed into a prime (71225741) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 19801 + ... + 23119.

It is an arithmetic number, because the mean of its divisors is an integer number (3311700).

Almost surely, 2^71225740 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 71225740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79480800).

71225740 is an abundant number, since it is smaller than the sum of its proper divisors (87735860).

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

71225740 is a wasteful number, since it uses less digits than its factorization.

71225740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 71225740 is about 8439.5343473441. The cubic root of 71225740 is about 414.5201595842.

Adding to 71225740 its reverse (4752217), we get a palindrome (75977957).

The spelling of 71225740 in words is "seventy-one million, two hundred twenty-five thousand, seven hundred forty".