2872945 has 8 divisors (see below), whose sum is σ = 3482280. Its totient is φ = 2275200.

The previous prime is 2872937. The next prime is 2872967. The reversal of 2872945 is 5492782.

It can be written as a sum of positive squares in 4 ways, for example, as 1766241 + 1106704 = 1329^2 + 1052^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2872945 - 2³ = 2872937 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, 2340 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (435285).

2^2872945 is an apocalyptic number.

It is an amenable number.

2872945 is a deficient number, since it is larger than the sum of its proper divisors (609335).

2872945 is a wasteful number, since it uses less digits than its factorization.

2872945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795.

The product of its digits is 40320, while the sum is 37.

The square root of 2872945 is about 1694.9764010157. The cubic root of 2872945 is about 142.1594618063.

The spelling of 2872945 in words is "two million, eight hundred seventy-two thousand, nine hundred forty-five".