82572865 has 8 divisors (see below), whose sum is σ = 100201320. Its totient is φ = 65315712.

The previous prime is 82572851. The next prime is 82572883. The reversal of 82572865 is 56827528.

It can be written as a sum of positive squares in 4 ways, for example, as 5817744 + 76755121 = 2412^2 + 8761^2 .

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 82572865 - 2¹³ = 82564673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92334 + ... + 93223.

It is an arithmetic number, because the mean of its divisors is an integer number (12525165).

Almost surely, 2^82572865 is an apocalyptic number.

It is an amenable number.

82572865 is a deficient number, since it is larger than the sum of its proper divisors (17628455).

82572865 is a wasteful number, since it uses less digits than its factorization.

82572865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185651.

The product of its digits is 268800, while the sum is 43.

The square root of 82572865 is about 9086.9612632607. The cubic root of 82572865 is about 435.4575095753.

The spelling of 82572865 in words is "eighty-two million, five hundred seventy-two thousand, eight hundred sixty-five".