71972500 has 30 divisors (see below), whose sum is σ = 157394930. Its totient is φ = 28788000.

The previous prime is 71972449. The next prime is 71972501. The reversal of 71972500 is 527917.

It can be written as a sum of positive squares in 5 ways, for example, as 14273284 + 57699216 = 3778^2 + 7596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71972501) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 11895 + ... + 16894.

Almost surely, 2^71972500 is an apocalyptic number.

It is an amenable number.

71972500 is an abundant number, since it is smaller than the sum of its proper divisors (85422430).

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

71972500 is a wasteful number, since it uses less digits than its factorization.

71972500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28813 (or 28796 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 71972500 is about 8483.6607664380. The cubic root of 71972500 is about 415.9637927684.

The spelling of 71972500 in words is "seventy-one million, nine hundred seventy-two thousand, five hundred".