72484921 has 4 divisors (see below), whose sum is σ = 72598644. Its totient is φ = 72371200.

The previous prime is 72484901. The next prime is 72484931. The reversal of 72484921 is 12948427.

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 55353600 + 17131321 = 7440^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 72484921 - 2¹¹ = 72482873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72484901) 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, 55900 + ... + 57181.

It is an arithmetic number, because the mean of its divisors is an integer number (18149661).

Almost surely, 2^72484921 is an apocalyptic number.

It is an amenable number.

72484921 is a deficient number, since it is larger than the sum of its proper divisors (113723).

72484921 is a wasteful number, since it uses less digits than its factorization.

72484921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113722.

The product of its digits is 32256, while the sum is 37.

The square root of 72484921 is about 8513.8076675481. The cubic root of 72484921 is about 416.9486352397.

The spelling of 72484921 in words is "seventy-two million, four hundred eighty-four thousand, nine hundred twenty-one".