71402500 has 75 divisors (see below), whose sum is σ = 169154447. Its totient is φ = 26364000.

The previous prime is 71402497. The next prime is 71402519. The reversal of 71402500 is 520417.

The square root of 71402500 is 8450.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 12 ways, for example, as 16760836 + 54641664 = 4094^2 + 7392^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=4, B=65.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 24 ways as a sum of consecutive naturals, for example, 5492494 + ... + 5492506.

Almost surely, 2^71402500 is an apocalyptic number.

71402500 is the 8450-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71402500

71402500 is an abundant number, since it is smaller than the sum of its proper divisors (97751947).

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

71402500 is an frugal number, since it uses more digits than its factorization.

71402500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The cubic root of 71402500 is about 414.8627794259.

Adding to 71402500 its reverse (520417), we get a palindrome (71922917).

The spelling of 71402500 in words is "seventy-one million, four hundred two thousand, five hundred".