71542720 has 56 divisors (see below), whose sum is σ = 171450000. Its totient is φ = 28434432.

The previous prime is 71542711. The next prime is 71542753. The reversal of 71542720 is 2724517.

It is a congruent number.

It is an unprimeable number.

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, 56656 + ... + 57904.

Almost surely, 2^71542720 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 71542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85725000).

71542720 is an abundant number, since it is smaller than the sum of its proper divisors (99907280).

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

71542720 is a wasteful number, since it uses less digits than its factorization.

71542720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445 (or 1435 counting only the distinct ones).

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

The square root of 71542720 is about 8458.2929719891. The cubic root of 71542720 is about 415.1341705819.

The spelling of 71542720 in words is "seventy-one million, five hundred forty-two thousand, seven hundred twenty".