72485865 has 12 divisors (see below), whose sum is σ = 125642244. Its totient is φ = 38659104.

The previous prime is 72485813. The next prime is 72485879. The reversal of 72485865 is 56858427.

It can be written as a sum of positive squares in 2 ways, for example, as 47114496 + 25371369 = 6864^2 + 5037^2 .

It is not a de Polignac number, because 72485865 - 2¹³ = 72477673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1610797 = 72485865 / (7 + 2 + 4 + 8 + 5 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 72485865.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805354 + ... + 805443.

It is an arithmetic number, because the mean of its divisors is an integer number (10470187).

Almost surely, 2^72485865 is an apocalyptic number.

It is an amenable number.

72485865 is a deficient number, since it is larger than the sum of its proper divisors (53156379).

72485865 is a wasteful number, since it uses less digits than its factorization.

72485865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610808 (or 1610805 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 72485865 is about 8513.8631067219. The cubic root of 72485865 is about 416.9504452612.

The spelling of 72485865 in words is "seventy-two million, four hundred eighty-five thousand, eight hundred sixty-five".