72101445 has 16 divisors (see below), whose sum is σ = 124236672. Its totient is φ = 35496000.

The previous prime is 72101401. The next prime is 72101459. The reversal of 72101445 is 54410127.

It is not a de Polignac number, because 72101445 - 2⁷ = 72101317 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 184681 + ... + 185070.

It is an arithmetic number, because the mean of its divisors is an integer number (7764792).

Almost surely, 2^72101445 is an apocalyptic number.

It is an amenable number.

72101445 is a deficient number, since it is larger than the sum of its proper divisors (52135227).

72101445 is a wasteful number, since it uses less digits than its factorization.

72101445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369772.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 72101445 is about 8491.2569740881. The cubic root of 72101445 is about 416.2120563489.

The spelling of 72101445 in words is "seventy-two million, one hundred one thousand, four hundred forty-five".