2872665 has 40 divisors (see below), whose sum is σ = 5305608. Its totient is φ = 1486080.

The previous prime is 2872621. The next prime is 2872669. The reversal of 2872665 is 5662782.

It can be written as a sum of positive squares in 4 ways, for example, as 219024 + 2653641 = 468^2 + 1629^2 .

It is not a de Polignac number, because 2872665 - 2⁶ = 2872601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2872669) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 16519 + ... + 16691.

2^2872665 is an apocalyptic number.

It is an amenable number.

2872665 is a deficient number, since it is larger than the sum of its proper divisors (2432943).

2872665 is a wasteful number, since it uses less digits than its factorization.

2872665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 222 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2872665 is about 1694.8938019829. The cubic root of 2872665 is about 142.1548433234.

The spelling of 2872665 in words is "two million, eight hundred seventy-two thousand, six hundred sixty-five".