2487865 has 8 divisors (see below), whose sum is σ = 3161160. Its totient is φ = 1873152.

The previous prime is 2487833. The next prime is 2487883. The reversal of 2487865 is 5687842.

It can be written as a sum of positive squares in 4 ways, for example, as 646416 + 1841449 = 804^2 + 1357^2 .

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 2487865 - 2⁵ = 2487833 is a prime.

It is an unprimeable number.

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, 14550 + ... + 14719.

It is an arithmetic number, because the mean of its divisors is an integer number (395145).

2^2487865 is an apocalyptic number.

It is an amenable number.

2487865 is a deficient number, since it is larger than the sum of its proper divisors (673295).

2487865 is a wasteful number, since it uses less digits than its factorization.

2487865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29291.

The product of its digits is 107520, while the sum is 40.

The square root of 2487865 is about 1577.2967380934. The cubic root of 2487865 is about 135.5009281764.

The spelling of 2487865 in words is "two million, four hundred eighty-seven thousand, eight hundred sixty-five".