72565445 has 8 divisors (see below), whose sum is σ = 87387936. Its totient is φ = 57846096.

The previous prime is 72565433. The next prime is 72565459. The reversal of 72565445 is 54456527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72565445 - 2⁴ = 72565429 is a prime.

It is a super-3 number, since 3×72565445³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72565399 and 72565408.

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 7 ways as a sum of consecutive naturals, for example, 24227 + ... + 27056.

It is an arithmetic number, because the mean of its divisors is an integer number (10923492).

Almost surely, 2^72565445 is an apocalyptic number.

It is an amenable number.

72565445 is a deficient number, since it is larger than the sum of its proper divisors (14822491).

72565445 is a wasteful number, since it uses less digits than its factorization.

72565445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51571.

The product of its digits is 168000, while the sum is 38.

The square root of 72565445 is about 8518.5353788078. The cubic root of 72565445 is about 417.1029751421.

The spelling of 72565445 in words is "seventy-two million, five hundred sixty-five thousand, four hundred forty-five".