2845945 has 4 divisors (see below), whose sum is σ = 3415140. Its totient is φ = 2276752.

The previous prime is 2845907. The next prime is 2845949. The reversal of 2845945 is 5495482.

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 840889 + 2005056 = 917^2 + 1416^2 .

It is a cyclic number.

It is not a de Polignac number, because 2845945 - 2⁹ = 2845433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2845949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284590 + ... + 284599.

It is an arithmetic number, because the mean of its divisors is an integer number (853785).

2^2845945 is an apocalyptic number.

It is an amenable number.

2845945 is a deficient number, since it is larger than the sum of its proper divisors (569195).

2845945 is an equidigital number, since it uses as much as digits as its factorization.

2845945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569194.

The product of its digits is 57600, while the sum is 37.

The square root of 2845945 is about 1686.9928867663. The cubic root of 2845945 is about 141.7127201291.

The spelling of 2845945 in words is "two million, eight hundred forty-five thousand, nine hundred forty-five".