71481040 has 160 divisors (see below), whose sum is σ = 189987840. Its totient is φ = 24883200.

The previous prime is 71481023. The next prime is 71481043. The reversal of 71481040 is 4018417.

It is a junction number, because it is equal to n+sod(n) for n = 71480996 and 71481014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71481043) 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 31 ways as a sum of consecutive naturals, for example, 1743420 + ... + 1743460.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^71481040 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 71481040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94993920).

71481040 is an abundant number, since it is smaller than the sum of its proper divisors (118506800).

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

71481040 is a wasteful number, since it uses less digits than its factorization.

71481040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 71481040 is about 8454.6460600075. The cubic root of 71481040 is about 415.0148347143.

Adding to 71481040 its reverse (4018417), we get a palindrome (75499457).

The spelling of 71481040 in words is "seventy-one million, four hundred eighty-one thousand, forty".