72014561 has 4 divisors (see below), whose sum is σ = 72651972. Its totient is φ = 71377152.

The previous prime is 72014549. The next prime is 72014563. The reversal of 72014561 is 16541027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8014561 + 64000000 = 2831^2 + 8000^2 .

It is a cyclic number.

It is not a de Polignac number, because 72014561 - 2¹⁴ = 71998177 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 72014561.

It is not an unprimeable number, because it can be changed into a prime (72014563) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 318536 + ... + 318761.

It is an arithmetic number, because the mean of its divisors is an integer number (18162993).

Almost surely, 2^72014561 is an apocalyptic number.

It is an amenable number.

72014561 is a deficient number, since it is larger than the sum of its proper divisors (637411).

72014561 is a wasteful number, since it uses less digits than its factorization.

72014561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637410.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72014561 is about 8486.1393460159. The cubic root of 72014561 is about 416.0448072576.

Adding to 72014561 its reverse (16541027), we get a palindrome (88555588).

The spelling of 72014561 in words is "seventy-two million, fourteen thousand, five hundred sixty-one".