71000424 has 96 divisors (see below), whose sum is σ = 211479840. Its totient is φ = 21340800.

The previous prime is 71000407. The next prime is 71000429. The reversal of 71000424 is 42400017.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 71000397 and 71000406.

It is not an unprimeable number, because it can be changed into a prime (71000429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124059 + ... + 124629.

It is an arithmetic number, because the mean of its divisors is an integer number (2202915).

Almost surely, 2^71000424 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 71000424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105739920).

71000424 is an abundant number, since it is smaller than the sum of its proper divisors (140479416).

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

71000424 is a wasteful number, since it uses less digits than its factorization.

71000424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 71000424 is about 8426.1749329099. The cubic root of 71000424 is about 414.0825992161.

The spelling of 71000424 in words is "seventy-one million, four hundred twenty-four", and thus it is an aban number.