72474881 has 4 divisors (see below), whose sum is σ = 72582612. Its totient is φ = 72367152.

The previous prime is 72474877. The next prime is 72474887. The reversal of 72474881 is 18847427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18847427 = 139 ⋅135593.

It can be written as a sum of positive squares in 2 ways, for example, as 67092481 + 5382400 = 8191^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 72474881 - 2² = 72474877 is a prime.

It is a super-2 number, since 2×72474881² = 10505216751928322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72474887) 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, 52850 + ... + 54203.

It is an arithmetic number, because the mean of its divisors is an integer number (18145653).

Almost surely, 2^72474881 is an apocalyptic number.

It is an amenable number.

72474881 is a deficient number, since it is larger than the sum of its proper divisors (107731).

72474881 is a wasteful number, since it uses less digits than its factorization.

72474881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107730.

The product of its digits is 100352, while the sum is 41.

The square root of 72474881 is about 8513.2180167079. The cubic root of 72474881 is about 416.9293836145.

The spelling of 72474881 in words is "seventy-two million, four hundred seventy-four thousand, eight hundred eighty-one".