71021124 has 72 divisors (see below), whose sum is σ = 192261888. Its totient is φ = 22900320.

The previous prime is 71021099. The next prime is 71021131. The reversal of 71021124 is 42112017.

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 = 71021097 and 71021106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28954 + ... + 31310.

It is an arithmetic number, because the mean of its divisors is an integer number (2670304).

Almost surely, 2^71021124 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 71021124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96130944).

71021124 is an abundant number, since it is smaller than the sum of its proper divisors (121240764).

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

71021124 is a wasteful number, since it uses less digits than its factorization.

71021124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 71021124 is about 8427.4031587435. The cubic root of 71021124 is about 414.1228368957.

The spelling of 71021124 in words is "seventy-one million, twenty-one thousand, one hundred twenty-four".