72459581 has 8 divisors (see below), whose sum is σ = 74343360. Its totient is φ = 70600032.

The previous prime is 72459577. The next prime is 72459619. The reversal of 72459581 is 18595427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72459581 - 2² = 72459577 is a prime.

It is a super-2 number, since 2×72459581² = 10500781757391122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72459551) 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 7 ways as a sum of consecutive naturals, for example, 80 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (9292920).

Almost surely, 2^72459581 is an apocalyptic number.

It is an amenable number.

72459581 is a deficient number, since it is larger than the sum of its proper divisors (1883779).

72459581 is a wasteful number, since it uses less digits than its factorization.

72459581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12115.

The product of its digits is 100800, while the sum is 41.

The square root of 72459581 is about 8512.3193666591. The cubic root of 72459581 is about 416.9000425590.

The spelling of 72459581 in words is "seventy-two million, four hundred fifty-nine thousand, five hundred eighty-one".