71725240 has 32 divisors (see below), whose sum is σ = 165746880. Its totient is φ = 27914112.

The previous prime is 71725229. The next prime is 71725249. The reversal of 71725240 is 4252717.

It is a junction number, because it is equal to n+sod(n) for n = 71725199 and 71725208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71725249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22752 + ... + 25711.

It is an arithmetic number, because the mean of its divisors is an integer number (5179590).

Almost surely, 2^71725240 is an apocalyptic number.

It is an amenable number.

71725240 is an abundant number, since it is smaller than the sum of its proper divisors (94021640).

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

71725240 is a wasteful number, since it uses less digits than its factorization.

71725240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48511 (or 48507 counting only the distinct ones).

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

The square root of 71725240 is about 8469.0755103494. The cubic root of 71725240 is about 415.4869012993.

Adding to 71725240 its reverse (4252717), we get a palindrome (75977957).

The spelling of 71725240 in words is "seventy-one million, seven hundred twenty-five thousand, two hundred forty".