72597641 has 4 divisors (see below), whose sum is σ = 73240212. Its totient is φ = 71955072.

The previous prime is 72597619. The next prime is 72597647. The reversal of 72597641 is 14679527.

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 687241 + 71910400 = 829^2 + 8480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72597641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72597647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321116 + ... + 321341.

It is an arithmetic number, because the mean of its divisors is an integer number (18310053).

Almost surely, 2^72597641 is an apocalyptic number.

It is an amenable number.

72597641 is a deficient number, since it is larger than the sum of its proper divisors (642571).

72597641 is a wasteful number, since it uses less digits than its factorization.

72597641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642570.

The product of its digits is 105840, while the sum is 41.

The square root of 72597641 is about 8520.4249307180. The cubic root of 72597641 is about 417.1646530835.

The spelling of 72597641 in words is "seventy-two million, five hundred ninety-seven thousand, six hundred forty-one".