72236565 has 12 divisors (see below), whose sum is σ = 125210124. Its totient is φ = 38526144.

The previous prime is 72236531. The next prime is 72236569. The reversal of 72236565 is 56563227.

It is a happy number.

72236565 is a `hidden beast` number, since 72 + 23 + 6 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33074001 + 39162564 = 5751^2 + 6258^2 .

It is not a de Polignac number, because 72236565 - 2⁶ = 72236501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72236569) 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 11 ways as a sum of consecutive naturals, for example, 802584 + ... + 802673.

It is an arithmetic number, because the mean of its divisors is an integer number (10434177).

Almost surely, 2^72236565 is an apocalyptic number.

It is an amenable number.

72236565 is a deficient number, since it is larger than the sum of its proper divisors (52973559).

72236565 is a wasteful number, since it uses less digits than its factorization.

72236565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605268 (or 1605265 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 72236565 is about 8499.2096691398. The cubic root of 72236565 is about 416.4718915423.

The spelling of 72236565 in words is "seventy-two million, two hundred thirty-six thousand, five hundred sixty-five".