72075445 has 32 divisors (see below), whose sum is σ = 99896832. Its totient is φ = 49496832.

The previous prime is 72075401. The next prime is 72075511. The reversal of 72075445 is 54457027.

It is a cyclic number.

It is not a de Polignac number, because 72075445 - 2²⁵ = 38521013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72075445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54664 + ... + 55966.

It is an arithmetic number, because the mean of its divisors is an integer number (3121776).

Almost surely, 2^72075445 is an apocalyptic number.

It is an amenable number.

72075445 is a deficient number, since it is larger than the sum of its proper divisors (27821387).

72075445 is a wasteful number, since it uses less digits than its factorization.

72075445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 72075445 is about 8489.7258495195. The cubic root of 72075445 is about 416.1620212237.

The spelling of 72075445 in words is "seventy-two million, seventy-five thousand, four hundred forty-five".