71255424 has 64 divisors (see below), whose sum is σ = 191323440. Its totient is φ = 23494656.

The previous prime is 71255369. The next prime is 71255467. The reversal of 71255424 is 42455217.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 71255391 and 71255400.

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, 36292 + ... + 38204.

Almost surely, 2^71255424 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 71255424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95661720).

71255424 is an abundant number, since it is smaller than the sum of its proper divisors (120068016).

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

71255424 is a wasteful number, since it uses less digits than its factorization.

71255424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2015 counting only the distinct ones).

The product of its digits is 11200, while the sum is 30.

The square root of 71255424 is about 8441.2927919839. The cubic root of 71255424 is about 414.5777366505.

The spelling of 71255424 in words is "seventy-one million, two hundred fifty-five thousand, four hundred twenty-four".