72534601 has 4 divisors (see below), whose sum is σ = 72563332. Its totient is φ = 72505872.

The previous prime is 72534599. The next prime is 72534661. The reversal of 72534601 is 10643527.

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 34527376 + 38007225 = 5876^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 72534601 - 2¹ = 72534599 is a prime.

It is a super-2 number, since 2×72534601² = 10522536684458402, which contains 22 as substring.

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 72534601.

It is not an unprimeable number, because it can be changed into a prime (72534661) 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, 10170 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (18140833).

Almost surely, 2^72534601 is an apocalyptic number.

It is an amenable number.

72534601 is a deficient number, since it is larger than the sum of its proper divisors (28731).

72534601 is a wasteful number, since it uses less digits than its factorization.

72534601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28730.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72534601 is about 8516.7247812760. The cubic root of 72534601 is about 417.0438701169.

The spelling of 72534601 in words is "seventy-two million, five hundred thirty-four thousand, six hundred one".