2870845 has 4 divisors (see below), whose sum is σ = 3445020. Its totient is φ = 2296672.

The previous prime is 2870839. The next prime is 2870863. The reversal of 2870845 is 5480782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1734489 + 1136356 = 1317^2 + 1066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2870845 - 2⁷ = 2870717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2870845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287080 + ... + 287089.

It is an arithmetic number, because the mean of its divisors is an integer number (861255).

2^2870845 is an apocalyptic number.

It is an amenable number.

2870845 is a deficient number, since it is larger than the sum of its proper divisors (574175).

2870845 is an equidigital number, since it uses as much as digits as its factorization.

2870845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574174.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2870845 is about 1694.3568101200. The cubic root of 2870845 is about 142.1248158666.

The spelling of 2870845 in words is "two million, eight hundred seventy thousand, eight hundred forty-five".