71972450 has 24 divisors (see below), whose sum is σ = 146039760. Its totient is φ = 26171600.

The previous prime is 71972449. The next prime is 71972501. The reversal of 71972450 is 5427917.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71972450.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 64880 + ... + 65979.

It is an arithmetic number, because the mean of its divisors is an integer number (6084990).

Almost surely, 2^71972450 is an apocalyptic number.

71972450 is an abundant number, since it is smaller than the sum of its proper divisors (74067310).

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

71972450 is a wasteful number, since it uses less digits than its factorization.

71972450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130882 (or 130877 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 71972450 is about 8483.6578195965. The cubic root of 71972450 is about 415.9636964436.

The spelling of 71972450 in words is "seventy-one million, nine hundred seventy-two thousand, four hundred fifty".