71421696 has 72 divisors (see below), whose sum is σ = 211226960. Its totient is φ = 23804928.

The previous prime is 71421689. The next prime is 71421731. The reversal of 71421696 is 69612417.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71421696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746 + ... + 12078.

Almost surely, 2^71421696 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 71421696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105613480).

71421696 is an abundant number, since it is smaller than the sum of its proper divisors (139805264).

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

71421696 is a wasteful number, since it uses less digits than its factorization.

71421696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10358 (or 10338 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 71421696 is about 8451.1357816568. The cubic root of 71421696 is about 414.8999536255.

The spelling of 71421696 in words is "seventy-one million, four hundred twenty-one thousand, six hundred ninety-six".