72320041 has 4 divisors (see below), whose sum is σ = 72354132. Its totient is φ = 72285952.

The previous prime is 72320033. The next prime is 72320047. The reversal of 72320041 is 14002327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14002327 = 1951 ⋅7177.

It can be written as a sum of positive squares in 2 ways, for example, as 64641600 + 7678441 = 8040^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 72320041 - 2³ = 72320033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72320047) 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 3 ways as a sum of consecutive naturals, for example, 13636 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (18088533).

Almost surely, 2^72320041 is an apocalyptic number.

72320041 is the 4546-th nonagonal number.

It is an amenable number.

72320041 is a deficient number, since it is larger than the sum of its proper divisors (34091).

72320041 is a wasteful number, since it uses less digits than its factorization.

72320041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34090.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72320041 is about 8504.1190607846. The cubic root of 72320041 is about 416.6322536556.

Adding to 72320041 its reverse (14002327), we get a palindrome (86322368).

The spelling of 72320041 in words is "seventy-two million, three hundred twenty thousand, forty-one".